Measurement Features |
Measurement Functions |
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Frequency, Frequency Burst, Period, Frequency Ratio, Time Interval, Pulse Width, Rise- and Fall-Times, Phase, Duty Factor, Voltage Level |
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Frequency A, B, C |
Range: |
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Input A, B: |
0.001 Hz to 300 MHz (PM 6690/0xx) |
Input C (option): |
Up to 3 GHz (PM 6690/6xx), up to 8 GHz (PM 6690/7xx) |
Resolution: |
12 digits in 1s measuring time |
Aux parameters: |
Vmax, Vmin, Vp-p |
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Frequency Burst A, B, C |
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Frequency and PRF of repetitive burst signals can be measured without external control signal and with selectable start arming delay. |
Functions: |
Frequency in burst (in Hz) |
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PRF (in Hz) |
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Number of cycles in burst |
Range: Input A, B, C: |
See Frequency spec. |
Minimum burst duration: |
40 ns (80 ns above 160 MHz) |
Minimum number of pulses in burst: |
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Input A or B: |
3 (6 above 160 MHz) |
Input C: |
3 x prescaler factor |
PRF range: |
0.5 Hz to 1 MHz |
Start delay range: |
10 ns to 2 s, 10 ns resolution |
Aux parameters: |
PRF, number of cycles in burst |
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Period A, B, C Average |
Range: |
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Input A,B: |
3.3 ns to 1000 s |
Input C: |
330 ps to 10 ns (PM 6690/6xx) |
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125 ps to 5 ns (PM 6690/7xx) |
Resolution: |
100 ps (single); 12 digits/s (average) |
Aux parameters: |
Vmax, Vmin, Vp-p |
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Frequency Ratio A/B, B/A, C/A, C/B |
Range: |
10 -9 to 10 11 |
Input frequency: |
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Input A, B: |
0.1 Hz to 300 MHz |
Input C (option): |
Up to 3 GHz, up to 8 GHz |
Aux parameters: |
Freq 1, Freq 2 |
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Time Interval A to B, B to A, A to A, B to B |
Range: |
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Normal calculation: |
0 to +10 6 s |
Smart calculation: |
-10 6 s to +10 6 s |
Resolution: |
100 ps |
Min. pulse width: |
1.6 ns |
Smart calculation: |
Smart Time Interval to determine sign (A before B or B before A) |
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Positive and Negative Pulse Width A, B |
Range: |
1.6 ns to 10 6 s |
Min. pulse width: |
1.6 ns |
Aux parameters: |
Vmax, Vmin, Vp-p |
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Rise and Fall Time A, B |
Range: |
700 ps to 1000 s (max. freq. 160 MHz) |
Trigger levels: |
10% and 90% of signal amplitude, or manual |
Min. pulse width: |
1.6 ns |
Aux parameters: |
Slew rate, Vmax, Vmin |
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Phase A Relative to B, B relative to A |
Range: |
-180° to +360° |
Resolution: |
0.001° to 100 kHz, decreasing to 0.1° to10 MHz, |
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1° to 160 MHz |
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Resolution can be improved via averaging (Statistics) |
Frequency range: |
up to 160 MHz |
Aux parameters: |
Freq (A), Va/Vb (in dB) |
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Positive and Negative Duty Factor A, B |
Range: |
0.000001 to 0.999999 |
Frequency range: |
0.1 Hz to 300 MHz |
Aux parameters: |
Period, pulse width |
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Vmax, Vmin, Vp-p A, B |
Range: |
-50 V to +50 V, -5 V to +5 V, within the ranges of max. |
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input voltage |
Frequency range: |
DC, 1 Hz to 300 MHz |
Mode: |
Vmax, Vmin, Vp-p |
Resolution: |
2.5 mV |
Auxiliary parameters: |
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Mode Vmax: |
Vmin, Vp-p |
Mode Vmin: |
Vmax, Vp-p |
Mode Vp-p: |
Vmin, Vmax |
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Time stamping A, B |
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Raw time stamp data together with pulse counts on input A or B, accessible via GPIB or USB only. |
Max sample speed: |
See GPIB specifications |
Max frequency: |
160 MHz |
Timestamp resolution: |
100 ps |
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All measurements are displayed with a main parameter value and smaller auxiliary parameter values (with reduced resolution). Some measurements are available only as auxiliary parameters.
Outputs and Inputs |
Inputs A and B |
Frequency range: |
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DC-coupled: |
DC to 300 MHz |
AC-coupled: |
10 Hz to 300 MHz |
Impedance: |
1 MΩ// 20 pF or 50 Ω(VSWR ≤ 2:1) |
Trigger slope: |
Positive or negative |
Max. channel timing difference: |
500 ps |
Sensitivity: |
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DC-200 MHz: |
15 mVrms |
200-300 MHz: |
25 mVrms |
Attenuation: |
x1, x10 |
Dynamic range (x1): |
30 mVp-p to 10 Vp-p within ±5 V window |
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Trigger |
Trigger level: |
Read-out on display |
Resolution: |
2.5 mV |
Uncertainty (x1): |
± (15 mV + 1% of trigger level) |
AUTO trigger level: |
Trigger level is automatically set to 50% point of input signal (10% and 90% for Rise/Fall Time) or can be set by the user |
AUTO hysteresis: |
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Time: |
Min. hysteresis window (plus hysteresis compensation) |
Frequency: |
33% and 67% of input signal amplitude |
Analog noise reduction filter: |
Nominal 100 kHz, RC-type. |
Digital low pass filter: |
Variable 1 Hz to 50 MHz cut-off frequency |
Max input voltage without damage: |
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1 MΩ: |
350 V (DC + AC pk) to 440 Hz, falling to 12 V rms (x1) at 1 MHz |
50 Ω: |
12 Vrms |
Connector: |
BNC |
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Optional Prescalers (C-input) |
3 GHz RF Input option (PM 6690/6xx) |
Rear Panel Inputs and Outputs |
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100 to 300 MHz: |
20 mVrms to 12 Vrms |
0.3 to 2.5 GHz: |
10 mVrms to 12 Vrms |
2.5 to 2.7 GHz: |
20 mVrms to 12 Vrms |
2.7 to 3.0 GHz: |
40 mVrms to 12 Vrms |
Prescaler factor: |
16 |
Input impedance: |
50 Ω nominal, VSWR <2.5:1 |
Max voltage without damage: |
12 Vrms, pin-diode protected |
Connector: |
Type N Female |
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8 GHz RF Input option (PM 6690/7xx) |
Operating Input Voltage Range: |
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300 to 500 MHz: |
20 mVrms to 7 Vrms |
0.5 to 3.0 GHz: |
10 mVrms to 7 Vrms |
3.0 to 4.5 GHz: |
20 mVrms to 7 Vrms |
4.5 to 6.0 GHz: |
40 mVrms to 7 Vrms |
6.0 to 8 GHz: |
80 mVrms to 7 Vrms |
Prescaler Factor: |
256 |
Input Impedance: |
50 Ω nominal, VSWR <2.5:1 |
Max Input Voltage Without Damage: |
7 Vrms |
Connector: |
Type N Female |
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Rear Panel Inputs and Outputs |
Reference Input: |
1, 5, or 10 MHz; 0.1 to 5 Vrms sine |
Input impedance: |
1 kΩ (AC coupled) |
Reference Output: |
10 MHz; > 1 Vrms sine into 50Ω |
Arming Input: |
Arming of all measuring functions |
Frequency Range: |
DC to 80 MHz |
Rear panel measurement inputs (option PM6690/xx2): |
A, B, C |
Impedance: |
Channels A and B: 1 MΩ // 50 pF or 50 Ω (VSWR ≤ 2:1); channel C: 50 Ω |
Connectors: |
Type SMA female for rear input C, BNC for all other inputs/outputs |
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Auxiliary Functions |
Trigger Hold-Off |
Time Delay Range: |
20 ns to 2 s, 10 ns resolution |
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External Start and Stop Arming |
Modes: |
Start, Stop, Start and Stop Arming |
Input channels: |
A, B or E (External Arming) |
Max rep. Rate for Arming signal: |
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Channel A,B: |
160 MHz |
Channel E: |
80 MHz |
Start Time Delay Range: |
20 ns to 2 s, 10 ns resolution |
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Statistics |
Functions: |
Maximum, Minimum, Mean, Δ (Max-Min), |
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Standard Deviation and Allan Deviation |
Display: |
Numeric, histograms or trend plots |
Sample Size: |
2 to 2*10 9 samples |
Limit qualifier: |
OFF or Capture values above/below/inside or |
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outside limits |
Measurement pacing |
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Pacing time range: |
2 µs to 1000 s, max 10 k measurements/sec. |
Mathematics |
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Functions: |
(K*X+L)/M and (K/X+L)/M. |
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X is current reading; K, L and M are constants |
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which can be set via keyboard or as frozen reference |
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value (X0) obtained through earlier measurement |
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Other Functions |
Measuring Time: |
20 ns to 1000 s for Frequency, Burst and Period Average. |
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Single cycle for other measuring functions |
Timebase Reference: |
Internal, External or Automatic |
Display Hold: |
Freezes result, until a new measurement is initiated via Restart |
Limit alarm: |
Indication on front panel and/or SRQ via GPIB |
Limit values |
Lower limit (limit 1), Upper limit (limit 2) |
Settings: |
OFF or Alarm if value is above/below/inside or outside limits |
On alarm: |
Alarm, STOP or CONTINUE |
Display: |
Numerical + Graphical |
Stored instrument set-ups: |
20 instrument setups can be saved/recalled in non-volatile memory; 10 can be user protected. |
Display: |
Backlit LCD Graphics screen for menu control, numerical read-out and status information |
Number of digits: |
14 digits in numerical mode |
Resolution: |
320 * 97 pixels |
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GPIB Interface |
Programmable functions: |
All front panel accessible functions |
Compatibility: |
IEEE 488.2-1987, SCPI 1999 |
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Model 53131A compatibility mode |
Interface Functions: |
SH1, AH1, T6, L4, SR1, RL1, DC1, DT1, E2 |
Max. measurement Rate |
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Via GPIB: |
2k readings/s (block) or 350 readings/s individually triggered |
To Internal Memory: |
250k readings/s, 100 k readings/s with cal on |
Internal Memory Size: |
750k readings. |
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USB Interface |
USB version: |
2.0 Full Speed (11 Mbit/s) |
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Calibration |
Mode: |
Closed case, menu controlled. One-shot. |
Cal. Frequencies: |
0.1, 1, 5, 10, 1.544 and 2.048 MHz |
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Environmental Specifications |
Environmental Data |
Class of Product: |
Class 3 according MIL-PRF-28800F |
Operating Temp: |
0°C to +50°C |
Storage Temp: |
-40°C to +71°C |
Humidity: |
5% to 95% (10°C to 30°C) |
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5% to 75% (30°C to 40°C) |
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5% to 45% (40°C to 50°C) |
Altitude: |
4600m |
Vibration: |
Random and sinusoidal according to MIL-PRF-28800F, Class 3 |
Shock: |
Half-sine 30G per MIL-PRF-28800F, Bench handling |
Transit Drop Test: |
The optional heavy duty transport case and the soft carrying case have been tested according to MIL-PRF-28800F |
Reliability: |
MTBF 30 000 h (calculated value) |
Safety: |
Designed and tested for measurement Category I, Polution Degree II in accordance with EN/IEC 61010-1:2001; CAN/CSA-C22.2 No 61010.1-04 (incl. approval) |
EMC: |
EN61326 (1997) A1 (1998), increased test levels according to EN 50082-2, Group 1, Class B |
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Power Requirements |
Basic version: |
90 to 265 Vrms, 45 to 440 Hz, < 40 W |
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Dimensions |
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210 x 90 x 395 mm (8.25 x 3.6 x 15.6 in) |
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Weight |
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Net 2.7 kg (5.9 lb), |
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Shipping 4.5 kg (9.9 lb) |
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PM6690 Time Base Options |
Timebase Option: |
Standard (/x1x) |
High Stability (/x5x) |
Ultra High Stability (/x6x) |
Time Base Type: |
Standard |
OCXO |
OCXO |
Uncertainty due to: |
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- Aging |
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per 24 hours (1) |
n.a. |
< 5 x 10 -10 |
< 3 x 10 -10 |
per month |
< 5 x 10 -7 |
< 1 x 10 -8 |
< 3 x 10 -9 |
per year |
< 5 x 10 -6 |
< 5 x 10 -8 |
< 1.5 x 10 -8 |
- Temperature variation: |
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0°C … 50°C |
< 1 x 10 -5 |
< 5 x 10 -9 |
< 2.5 x 10 -9 |
20°C … 26°C (2) |
< 3 x 10 -6 |
< 1 x 10 -9 |
< 4 x 10 -10 |
- Power voltage variations |
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± 10% |
< 1 x 10 -8 |
< 5 x 10 -10 |
< 5 x 10 -10 |
Short Term Stability τ = 1 s |
n.a. |
< 1 x 10 -11 |
< 5 x 10 -12 |
(Root Allan Variance) τ = 10 s |
n.a. |
< 1 x 10 -11 |
< 5 x 10 -12 |
Power-on Stability: deviation vs. final value after 24 hr ‘on’-time, after a warm-up time of 10 min.: |
n.a. |
< 1 x 10 -8 |
< 5 x 10 -9 |
Typical total uncertainty, for operating temperature 20°C … 26°C, at 2 σ (95%) confidence interval: |
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- 1 year after calibration |
< 7 x 10 -6 |
< 6 x 10 -8 |
< 1.7 x 10 -8 |
- 2 years after calibration |
< 1.2 x 10 -5 |
< 1.2 x 10 -7 |
< 3.5 x 10 -8 |
Notes: n.a. not discernible, negligible versus 1 C temperature variation (1) after 1 month of continuous operation (2) typical values
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