3.
Use the Up/Down Arrow key to highlight
RETURN LOSS, then press
ENTER
.
4.
Press the
START CAL
key.
5.
Use the Up/Down Arrow key to highlight
OSL, then press
ENTER
.
6.
Follow the instructions on the screen to
perform a calibration using a 22N50
Open/Short and 28N50-2 or SM/PL Ter-
mination.
7.
Connect the 20 dB offset to the Refl Test
Port and verify that the reading is:
q
S120A: 20 dB
±
1.7 dB
q
S235A: 20 dB
±
1.7 dB
q
S250A: 20 dB
±
1.7 dB
q
S251A: 20 dB
±
1.7 dB
8.
Connect the 6 dB offset to the Refl Test
Port and verify that the reading is:
q
S120A: 6 dB
±
1.2 dB
q
S235A: 6 dB
±
1.2 dB
q
S250A: 6 dB
±
1.2 dB
q
S251A: 6 dB
±
1.2 dB
7.
POWER MONITOR VERIFICATION
If the Power Monitor (Option 5) is installed in the
Site Master, the following test can be used to verify
the accuracy of the power measurements. Measure-
ment calibration of the Site Master is not required
for this test.
a.
Equipment Required:
·
RF Detector, 10 MHz to 20 GHz,
Anritsu 560-7N50B
·
10 dB Attenuator, Weinshel 1R-10
·
30 dB Attenuator, Weinshel 1R-30
·
RF Reference Source, 0.050 GHz,
Anritsu MA2418A
·
DC Power Supply, Anritsu 2000-933
b.
Procedure
1.
Connect the DC power supply to the
MA2418A Reference Source. (Refer to
Figure 5.)
2.
Connect the MA2418A Reference Source
to the input of the 560-7N50B RF detec-
tor.
3.
Connect the RF Detector output to the
RF Detector input of the Site Master.
4.
Connect the DC power supply to the ap-
propriate line voltage to supply power to
the MA2418A Reference Source.
5.
Press and hold the
ESCAPE/CLEAR
key,
then press the
ON/OFF
key to turn on
the Site Master. (This sets the instru-
ment to the factory preset state.)
6.
Press the MODE soft key.
7.
Use the Up/Down Arrow key to highlight
POWER MONITOR, then press
ENTER
.
8.
Press the ZERO soft key to zero the
power monitor.
When complete,
ZERO ADJ:ON
is dis-
played in the message area.
9.
Verify that the power monitor reading is
0.0 dBm
±
1 dB.
10.
Connect the output of the MA2418A Ref-
erence Source to the two attenuators so
as to add 40 dB of attenuation (Figure 5).
Site Master MM
5
