Regarding narrow band:  it’s just half of what it is on 440 MHz.

What I did, for my 900 system, was to set the transmit level so deviation was 1.5 kHz for TXVOICE and 300 Hz for TXTONE. 

This results in 2.5 KHz max deviation as required for “narrow band”.

Receive setup is the same – you set the service monitor for 1.5 kHz then run RXVOICE and 300 Hz for RXTONE.

73

Ken

From: app_rpt-users-bounces@qrvc.com [mailto:app_rpt-users-bounces@qrvc.com] On Behalf Of Paul M. Nannery
Sent: Sunday, October 24, 2010 1:04 PM
To: app_rpt-users@qrvc.com
Subject: [App_rpt-users] 900 levels and com port ?

I am putting a up a 900 meg system and would like some guidance on getting the levels right I know dsp is not set up for the narrow band. Also Jim is there any way to use the com port for ptt like you did with the lpt port as most newer computers do not have lpt ports?