Bias Tee (Option 10) Verification; Bias Tee Verification (Option 10A) - Anritsu Spectrum Master MS2711D Maintenance Manual

10. Bias Tee (Option 10) Verification

If the Bias Tee (Option 10) is installed in the Spectrum Master, the following test can be used to verify
the performance of the bias termination.
a. Equipment Required:
· 105 Ohm, 1 Watt, Low Current Load, Anritsu T3377
· Spectrum Master External Power Supply, Anritsu Part Number 40-168
b. Procedure:
1. Connect the external power supply (Anritsu part number 40-168) to the Spectrum Master.
2. On the Spectrum Master, press and hold the ESCAPE/CLEAR key, then press the On/Off key to
turn on the Spectrum Master and set the instrument to the factory preset state.
NOTE: Before continuing, allow a 5-minute warm up for the internal circuitry to stabilize.
3. Press the System Options key, then select the Application Options soft key.
4. Connect the 105 Ohm load to the RF In test port.
5. Press the Bias Tee (On/Off) soft key to turn the Bias Tee On.
6. Verify the voltage and current readings displayed on the upper left side of the screen are within
the specifications shown in Table 9.
Table 9. Bias Tee Verification, 105 Ohm Load
Voltage Setting (V)
Voltage Specification (V)
Current Specification (mA)
7. Press the Bias Tee (On/Off) soft key to turn the Bias Tee Off.

11. Bias Tee Verification (Option 10A)

If the Bias Tee (Option 10A) is installed in the Spectrum Master, the following test can be used to verify
the performance of the bias termination.
a. Equipment Required:
· 105 Ohm, 1 Watt, Low Current Load, Anritsu T3377
· 40 Ohm, 5 Watt, High Current Load, Anritsu T2904
· Spectrum Master External Power Supply, Anritsu Part Number 40-168
b. Procedure:
1. Connect the external power supply (Anritsu part number 40-168) to the Spectrum Master.
2. Press the On/Off key to turn on the Spectrum Master.
3. Press the Recall Setup (6) key, then select the Default mode setting.
4. Press the Enter key.
NOTE: Before continuing, allow a five minute warm up for the internal circuitry to stabilize.
Spectrum Master MM
18
± 1.0
120 - 220
19