HP 8447D Operation And Service Manual page 27

Figure 5 VSWR Test Setup: 1 to 110 MHz
Procedure:
1 Connect the equipment as shown in Figure 5. Set the generator/sweeper for a −10 dBm
signal, sweeping from 1 to 110 MHz.
2 Connect the short to the directional bridge and calibrate the network analyzer for a 0 dB
return loss reference on the display (use the center horizontal graticule line).
3 Remove the short from the directional coupler, attach the coupler to the amplifier IN-
PUT. (Terminate the OUTPUT with 50 Ω.)
4 Decrease the display reference level to −10 dB. The center horizontal graticule line now
represents a return loss of 10 dB. The measured return loss should be as shown below:
INPUT VSWR, 1 to 110 MHz
HP 8447D, >9.6 dB:___________
HP 8447E, >8.8 dB:___________
HP 8447F Option H64 Low frequency preamp, 1 to 50 MHz >9.6 dB:__________
5 Measure return loss at the amplifier OUTPUT. Terminate the INPUT with 50Ω. The
measured return loss should be as shown below.
For the HP 8447F option H64 low frequency preamp, steps 7 through 11 are not
needed.
DRAFT
Operation and Service Manual
Performance Tests Procedures
HP 8447F Preamp, >9.6 dB:_____________
HP 8447F Power amp, >8.8 dB:__________
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