Transmitter; General Instructions On Troubleshooting - Nokia NHM-7 Series Troubleshooting Manual

NHM-7
Troubleshooting and Tuning Instructions

Transmitter

General instructions on Troubleshooting

Connect test jig to computer with DAU9S cable or to FPS–8 Flash Prommer
with XCS–4 modular cable.
Make sure that you have PKD–1 dongle connected to computers parallel port.
Connect DC power supply to module test jig with FLC–2 cable.
NOTE: When repairing or tuning transmitter use external DC supply with at
least 3A current capability. Set the DC supply voltage to 3.9V and set the
jumper connector on test jig to "bypass" position.
Connect RF–cable to the module test jig (MJS–46) RF connector and to mea-
surement equipment or at least 10dB attenuator, otherwise the PA may be
damaged. Normally spectrum analyzer is used as measurement equipment.
NOTE: Normally Spectrum analyzer maximum input power is +30dBm. It is
recommended to use 10dB attenuator on Spectrum analyzer input to prevent
damage.
Set the phone module to test jig and start Phoenix service sofware.
Initialize connection to phone. (use FBUS driver when using DAU9S and
COMBOX driver when using FPS–8)
Select product from the menu: File –> Choose product –> NHM–7
From toolbar set operating mode to "Local".
Activate RF controls window from the menu:
Maintenance –> Tuning –> RF Controls
From the RF controls window:
– Select band "GSM900" or "GSM 1800" (Default = "GSM900")
– Set Active unit to "Tx" (Default = "Rx")
– Set Operation mode to "Burst" (Default = "Burst")
– Set Tx data type to "Random" (Default = "All1")
– Set Rx/Tx channel to 37 on GSM900 band or 700 on GSM1800 band
(Defaults)
– Set Tx PA mode to "Free" (Default)
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PAMS Technical Documentation
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