Expansion Cabinet Rfds - Motorola DIMETRA MTS 4 Installation, Configuration, And Service Manual

Applicant: Motorola Solutions
3 Loosen the all the locking knobs of the MTCC, see figure below (the design of the MTCC may look slightly
different), and turn the tuning knobs counter clock wise as many turns as possible.
4 Power up the BTS and let all BRs key up. Observe that the TX LEDs of all BRs shine.
5 Connect the service computer to the service port of Base Radio 1 and log on. The service port connector is located
on the front panel of the Base Radio module. The default password is motorola.
6 At the BR) prompt, type: dekey This command stops all RF transmission.
7 Repeat step 5 and 6 for all BRs.
8 Observe on the power meter that all BRs have dekeyed and that all TX LEDs are off.
9 Connect the service computer to the service port of Base Radio 1.
10 At the BR) prompt, type: key. After a while the TX LED of the BR will turn on and the power meter will show
the BR output power minus the loss of the MTCC and the duplex filter.
11 Slowly turn the tuning knob of the cavity to be tuned, until the power level displayed at the power meter is at its
absolute maximum.
12 Tighten the locking knob.
13 Repeat step 11 and 12 until the power level is still at its absolute maximum with the locking knob firmly
tightened.
14 Dekey the BR.
15 Repeat step 9 to 14 for all remaining BRs connected to the MTCC.

Expansion Cabinet RFDS

The Expansion Cabinet uses a high-power RFDS intended for up to four high power Base Radios in addition to the
Base Radios in the MTS 4 Prime cabinet. The RFDS in the Expansion Cabinet is made up of the following:
• Up to three RX Splitters – a passive device functioning as an extension for the Receiver Multi Coupler function of
the Duplexer/Preselector in MTS 4 to support eight Base Radios. It is connected to the Exp Cabinet connector on
the Duplexer/Preselector present in the MTS 4 Prime Cabinet giving the right signal level for the RX-Splitter.
• Cavity Combiners – combining of eight carriers on 1 TX antenna.
Table 74: MTS 4 Expansion Cabinet RF Configurations on page 258
Expansion Cabinet. In the table, Low Power is valid for both 400 MHz and 260 MHz versions of the Expansion
Cabinet, while High Power is valid for both 400 MHz and 800 MHz versions of the Expansion Cabinet.
Equipment Type: ABZ89FC5827 / 109AB-5827
Radio Frequency Distribution System | 257
lists the RF configurations of the MTS 4
6802800U74-AD | September 2014 | Send Feedback
Exhibit D2