User Guide

PAMS
Technical Documentation
WinTesla User Guide
NHD–4
Page 46
Original 11/97
Band Power 1 Tuning (BPOW1)
Description of Tuning
For this step the AT–109 is set to minimum attenuation and the
TX_OFFSET PDM is adjusted until the CDMA TX output bandpower is 16
dBm +/– 1.0 dB. This bandpower level is position BPOW1 on Figure 2.2
above.
TX Offset calibration steps & equipment:
– Using the JBS–7 service jig, replace the standard battery of the phone
with the dummy battery BTS–4.
– Apply +6.0 V to dummy battery.
– Connect the modulation (or spectrum) analyzer to antenna connector.
– Select ” Tuning – Auxiliary AGC”
– Use the Up, Dn, PgUp or PgDn keys to adjust the BPOW1 power level
to the target range.
– Enter the actual measured TX Power into the dialog box and press
<Enter>.
Band Power 1 – 2 Tuning (BPOW1 – BPOW2)
Description of Tuning
For this step the AGC_REF PDM is adjusted to provide 5 dB of
attenuation from the AT–109. The CDMA TX output bandpower will then
be approximately 11 dBm, 5 dB off from the initial 16 dBm set in the
BPOW1 step. This bandpower position is referred to as BPOW2. This 5
dB is necessary to move the AT–109 dynamic range off the curved portion
of the attenuation response as seen between points BPOW1 and BPOW2.
– Use the Up, Dn, PgUp or PgDn keys to adjust the BPOW2 power level
to the target range.
– Enter the actual measured TX Power into the dialog box and press
<Enter>.