Charles 7305-14 4W-2W, Руководство пользователя

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Section 730–514–202
16
Three-conductor test cords having one end terminated in bantam plugs and the other end suitable for
connecting to the TMS and VFO.
Note: If TMS or VFOconnecting cords are terminated in Type 310 plugs, they can be adapted for connecting
into bantam jacks by attaching a Charles Type 310 to Bantam Jack Adapter (14 inch) (p.n. 003-210367).
One open bantam plug.
8.1 RCV Alignment Procedure
Use the following steps to perform the receive alignment procedure.
Step Action
1. RCV Facility Verification
Arrange the TMS for terminated measurement at the impedance specified on the CLR. Connect the
TMS to the RCV MON jack on the front panel of the CFM. Insert and open bantam plug into the RCV
LINE jack on the CFM to disconnect the CFM from the RCV LINE.
2. Request the distant terminal to send a 1000Hz test tone at the required level and impedance specified
on the CLR.
3. Record the level measured on the TMS. If the recorded level is not at the level specified on the CLR,
locate and correct the facility fault before proceeding.
4. If equalization is required, request the distant terminal to send a 2800 Hz test tone and the a 400 Hz
test tone at the required level and impedance specified on the CLR. Record the levels measured on the
TMS.
5. RCV Gain Adjustment
Calculate the required RCV GN setting by subtracting the 1000 Hz level recorded in Step 3, from +7
dB, SF receiver TLP. Set the RCV ATN switches to off (located on the front panel).
6. Program the required RCV gain by setting the RCV GN switches (located on the front panel) equal to
the gain calculated in Step 5 +/–0.05 dB. See Table 4.
7. If no equalization is required, ensure that all switches on S8 are out (off). Proceed to step 10.
8. Cable Equalization
Calculate the required equalization by subtracting the 2800 Hz level recorded in Step 4 from the 1000
Hz level recorded in Step 3. Also subtract the 400 Hz level recorded in Step 4 from the 1000 Hz level
recorded in Step 3.
9. Using the 2800 Hz and 400 Hz loss figures calculated in Step 8 and Table 5, locate the row that most
accurately matches the required equalization. Program S8 RCV EQLR by setting the indicated (X)
equalizer switches IN (ON).
10. RCV Attenuator Adjustment
Calculate the required RCV ATN setting by subtracting the receive station equipment level, specified on
the CLR from +7TLP.
11. Program the required RCV attenuation by setting the RCV ATN switches (located on the front panel)
equal to the attenuation calculated in Step 10, +/–0.05 dB. See Table 4.
12. Remove all test cords.
13. Receive Station Equipment Verification
Arrange the TMS for 600 ohm terminated measurement. Connect the TMS to the RCV STA jack on the
front panel of the CFM.
14. Request the distant terminal to send a 1000 Hz, a 2800 Hz, and then a 400 Hz test tone at the required
level and impedance specified on the CLR.
15. Verify that the levels measured on the TMS are those specified on the CLR.
16. Remove all test cords and perform the transmit alignment procedure.