Racal Instruments AN/TRC-207, Operation And Maintenance Instructions

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TO 31R2-2TRC207-1
3-1
CHAPTER 3 PREPARATION FOR USE AND RESHIPMENT
3-1 INTRODUCTION.
This chapter is divided into two sections. Section I. Preparation For Use provides post-installation operational checks
that must be performed prior to operating the BDR. Section II. Preparation For Reshipment contains procedures for
reshipment of the unit.
Section I. PREPARATION FOR USE
3-2 INSPECTION.
If the BDR has not been inspected as part of the installation process, or if the equipment has not been used recently, check
to ensure that all cable connections are tight and no damage is visible on the exterior of the BDR.
3-3 POST-INSTALLATION CHECKOUT.
3-3.1 Preliminary
Before performing the post-installation checkout procedures of paragraph 3-3.3, perform the following preliminary
procedures.
NOTE
The receive and transmit frequencies programmed into the receiver-transmitters must be separated
by at least 4 MHz or 3 percent of the lower frequency, whichever is greater. Similarly, the
frequencies on the two nets for bi-directional operation must have similar separations. If the
minimum frequency separation is not used, the BDR will not operate properly. See paragraph 4-3
for additional data.
NOTE
For all modes of operation, the receive and transmit frequencies on the channel in use on each
radio must be the same (simplex operation).
a. Ensure that both receiver-transmitters (SS-4100807-512) have been programmed with the correct
receive and transmit frequencies and CTCSS tones. (TO 31R2-2PRC139-1 describes procedures for
programming all programmable parameters.) Use of CTCSS tones is recommended for non-secure
operation. ATONES=NONE@ should be used for secure operation.
b. Ensure that the channel select switch on each radio is set to the correct channel, the mode switch is set
to CLR, and the SCAN switch is turned off. On/Off/Volume control setting is ignored.
NOTE
Other programmable parameters (RF power, data rate, etc.) may be set to any value.
NOTE
Be sure to align the receiver-transmitters so that the orientation of the control knobs and
connectors corresponds to the markings on the sleeve door. The receiver-transmitters cannot be
inserted in the bi-directional repeater with the battery attached. The CCI receiver-transmitter
(RT-1696/U (C)) cannot be inserted into the BDR.