Transmission Measurement Verification (Option 21) - Anritsu Spectrum Master MS2711D Maintenance Manual

12. Transmission Measurement Verification (Option 21)

The tests in this section can be used to verify the Transmission Measurement functionality (Option 21)
of a Spectrum Master equipped with Option 21. There are three parts to this test:
· Transmission Power Verification
· Insertion Loss Verification
· Isolation Test
Transmission Power Verification
a. Equipment Required:
· Anritsu 15NN50-1.5C RF Coaxial Cable or equivalent
b. Procedure:
1. On the Spectrum Master, press and hold the
turn on the Spectrum Master. (This sets the instrument to the factory preset state.)
2. On the Spectrum Master, press the
sion Measurement
3. On the display, verify that the
MHz, the VBW is 300 kHz, the Ref Level is 0.0 dBm, and Atten is Dynamic.
4. Use the 15NN50-1.5C RF Coaxial Cable to connect the RF In port of the Spectrum Master to the
RF Out port.
5. Press the
LIMIT
ter and press
–21
6. Verify that the signal is above the –21 dBm limit line.
NOTE: Ignore the "Fail if data is: Above Line" message on the bottom of the display.
Insertion Loss Verification
c. Equipment Required:
· Anritsu 15NN50-1.5C RF Coaxial Cable or equivalent
· Weinschel 44-20, 20 dB attenuator
d. Procedure:
1. On the Spectrum Master, press and hold the
turn on the Spectrum Master. (This sets the instrument to the factory preset state.)
2. On the Spectrum Master, press the
sion Measurement
3. Press the
BW/SWEEP
4. Use the 15NN50-1.5C RF Coaxial Cable to connect the RF In port of the Spectrum Master to the
RF Out port. Press the
will beep when one sweep is completed.
5. Insert the 20 dB attenuator between the RF Coaxial cable and the RF Out port.
6. Press the
AMPLITUDE
keypad to enter –15 and press the
7. Press the
Scale
key to set the scale to 1 dB/Div.
ENTER
8. Press the
LIMIT
Spectrum Master MM
MODE
and press to select Transmission Measurement mode.
ENTER
Trans. Meas Cal Off
key, select the
Single Limit
to set the limit line to –21 dBm.
ENTER
MODE
and press to select Transmission Measurement mode.
ENTER
key and select the
Calibrate TM
key on the Spectrum Master to calibrate. The Spectrum Master
ENTER
key and select the
ENTER
soft key and use the Up/Down arrow key or the keypad to enter 1 and press the
key and select the
Multiple Upper Limits
key, then press the
ESCAPE/CLEAR
key. Use the up/down arrow key to highlight
message is displayed and that the RBW is 1
soft key and then the
Edit
key, then press the
ESCAPE/CLEAR
key. Use the Up/Down arrow key to highlight
soft key.
soft key. Use the Up/Down arrow key or the
Ref Level
key to set the reference level to –15 dBm.
soft key.
key to
ON/OFF
Transmis-
soft key. Use the keypad to en-
key to
ON/OFF
Transmis-
21