Appendix B
Performance Specifications
FREQUENCY
CW MODE
Output: Twenty independent, presettable CW frequencies
(F0 – F9 and M0 – M9).
Accuracy: Same as internal or external 10 MHz time base.
Internal Time Base Stability:
With Aging:
<2 x 10
-8
/day
(<5 x 10
–10
/day with Option 16)
With Temperature:
<2 x 10
-8
/
°
C over 0
°
C to 55
°
C
(<2 x 10
-10
/
°
C with Option 16)
Resolution:
1 kHz (0.1 Hz with Option 11)
External 10 MHz Reference Input: A c c e pt s ex tern al
10 MHz
±
100 Hz, 0 to +10 dBm time base signal. Automat-
ically disconnects the internal high-stability time-base option,
if installed. BNC, rear panel, 50
Ω
impedance.
10 MHz Reference Output: 0.5 Vp-p into 50
Ω
,AC coupled.
Rear panel BNC; 50
Ω
impedance.
Switching Time (typical maximum): <40 ms to be within
1 kHz of final frequency.
ANALOG SWEEP MODE
Sweep Width: Independently selected from 1 MHz to full
range continuous sweep.
Accuracy: The lesser of:
±
30 MHz or
±
(2 MHz + 0.25% of sweep width) for sweep
speeds of
≤
50 MHz/ms.
Sweep Time Range: 30 ms to 99 seconds
PHASE-LOCKED STEP SWEEP MODE
Sweep Width: Independently selected, 1 kHz (0.1 Hz with
Option 11) to full range. Every frequency step in sweep range
is phase-locked.
Accuracy: Same as internal or external 10 MHz time base.
Resolution (Minimum Step Size):
1 kHz (0.1 Hz with Option 11)
Steps: User-selectable number of steps or the step size.
Number of Steps:
Variable from 1 to 10,000
Step Size:
1 kHz (0.1 Hz with Option 11) to the full fre-
quency range of the instrument. (If the step size does not
divide into the selected frequency range, the last step is
truncated.)
Dwell Time Per Step: Variable from 1 ms to 99 seconds
Switching Time (typical maximum): <15 ms + 1 ms/GHz
step size or <40 ms, whichever is less.
ALTERNATE SWEEP MODE
Sweeps alternately in analog or step sweep between any two
sweep ranges. Each sweep range may be associated with a
different power level.
MANUAL SWEEP MODE
Provides stepped, phase-locked adjustment of frequency be-
tween sweep limits. User-selectable number of steps or step
size.
360B VNA SOURCE LOCK MODE
Under control of the WILTRON 360B Vector Network Ana-
lyzer, the synthesized sweep generator is phase-locked at a
typical <8.5 ms/step sweep speed. Frequency resolution is
limited to 100 kHz.
Model
Frequency Range
68137B
2.0 to 20.0 GHz
68145B
0.5 to 20.0 GHz
68147B
0.01 to 20.0 GHz
68153B
2.0 to 26.5 GHz
68155B
0.5 to 26.5 GHz
68159B
0.01 to 26.5 GHz
68163B
2.0 to 40.0 GHz
68165B
0.5 to 40.0 GHz
68169B
0.01 to 40.0 GHz
68175B
0.5 to 50.0 GHz
68177B
0.01 to 50.0 GHz
68185B
0.5 to 60.0 GHz
68187B
0.01 to 60.0 GHz
68195B
0.5 to 65.0 GHz
(with usable output to 67 GHz)
68197B
0.01 to 65.0 GHz
(with usable output to 67 GHz)
MODEL SUMMARY
681XXB OM
B-1