DRAFT
25
Operation and Service Manual
Performance Tests Procedures
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:
5
Measure return loss at the amplifier OUTPUT. Terminate the INPUT with 50
Ω
. 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.
INPUT VSWR, 1 to 110 MHz
HP 8447D, >9.6 dB:___________
HP 8447F Preamp, >9.6 dB:_____________
HP 8447E, >8.8 dB:___________
HP 8447F Power amp, >8.8 dB:__________
HP 8447F Option H64 Low frequency preamp, 1 to 50 MHz
>9.6 dB:__________
