Pulse Modulation Accuracy Test - HP 8340B Manual

4-13. PULSE MODULATION ACCURACY TEST

THIS TEST IS NOT APPLICABLE TO INSTRUMENTS EQUIPPED WITH
OPTION 006, DELETE PULSE MODULATION.
Specification
For CW mode and frequencies =400 MHz only:
Minimum Internally Leveled RF Pulse Width (TI, RFI): 100 nanoseconds
Pulse Repetition Frequency:
Internally leveled: 100 Hz to 5 MHz
Accuracy of Internally Leveled RF Pulse VI, P1 (relative to CW mode level):
ALC attempts to hold pulse amplitude to same level as leveled CW signal.
(see Frequency Ranges and Bandswitch Points for complete description)
Pulse Width
100 to <200 ns
200 to <500 ns
=500 ns
1. Band 41>20.0 to 26.5 GHz) only applies to the HP 8340B.
2. -i-15 to ~-55~C.Duty Cycle must be >0.010/0
Description
The DUT's RF output frequency is down converted to 50 MHz using a mixer and a local oscillator. The
50 MHz IF signal is amplified and applied to an oscilloscope. The DUT is pulsed using a pulse
generator. The IF modulation envelope is positioned to convenient horizontal graticule lines. The
pulse is turned OFF and the DUT's output power level is adjusted so that the IF carrier is at the
horizontal graticule lines established when the DUT was being pulsed. The change in DUT output
power level is the accuracy error of the leveled RF pulse.
HP 8340B/41B
NOTE
Table 4-26. Pulse Modulation Accuracy Test Specifications
NOTE
Bands and Approximate Frequency Ranges (0Hz)
Band 0
0.4 to <2.3
+3/—0.3 dB 2
+ 1 .5/—0.3 dB2
~0.3 dB
Bands I - 4'
2.3 to 26.5
+1.5/—0.3 dB2
-'- 0.3 dB
--0.3 dB
Performance Tests 4-63