User's Manual
Planning and PreparationPlanning and PreparationIntroduction
MCPS2135 System Operation 11
2001 Spectrian Corporation. All rights reserved.
RF Drive Power Worksheet
A) Total output power (P
OUT
) required = W dBm
B) Determine total output required for each fully loaded
CDMA Frequency Assignment (FA):
# of FA’s =
total power per FA =
total CDMA power (P
CDMA
) =
Total available analog power (P
AN
) =
(P
AN
= P
OUT
– P
CDMA
)
W
D) Total # of analog channels, including setup (#ch) =
E) Maximum per channel analog output power (P
AN
/ch) =
(P
AN
/ch = P
AN
/# of channels)
W dBm
F) System Gain (Gain) * = dB
G) Maximum composite input power (P
IN
) =
(P
IN
= P
OUT
in dBm – Gain in dB)
dBm
H) Maximum per channel analog input power (P
IN
/ch ) =
(P
IN
/ch in dBm = P
AN
/ch in dBm – Gain in dB)
dBm
* NOTE: Depends on configuration which is factory settable from 30 dB to 60 dB. On single
module systems, the gain may be adjusted by the end user with Spectrian’s Graphical User
Interface software. Consult with factory or Spectrian Sales for more information.
1.1.12.3.1 Set RF input drive power for each channel
∗ Caution: If the RF Input Cable is connected to the MCPS2135, disconnect it
from the MCPS2135. Connect the RF input cable to the Power Meter for the
following step.
∗ Caution: Make sure that the power to be measured with the meter does not
exceed the manufacturers recommended maximum input level.
Switch on the RF input drive power at the customer provided host system exciter
following the instructions supplied with your RF source equipment.
Set and verify the RF input drive level for each individual channel
1. Key-on each RF input channel individually.
2. Monitor the RF input using a HP436A or equivalent power meter.
3. Verify that the maximum input power for the channel does not exceed the
calculated levels on the RF Drive Power worksheet (line H).
4. Key off the channel and repeat for the remaining channels. Continue to
verify the required channel input power is not exceeded.