ASCOM H952T User Manual

TD 92022EN
3 July 2013 / Ver. G
Installation Guide
H/U952T Terminal Transmitter
13
5 Installation Test Procedure
1 Check that all sections of switch SW200 on the Terminal Transmitter are set to OFF.
2 Check that address switch SW100 has the right addr
ess. See the System Installation
document, chapter Addressing.
3 Energize all units in the Ascom Paging System. Function in
dicator LED100 on the
Terminal Transmitter should light red for about 1 second and then change to a
flashing green.
If it continues to indicate steady red, check that supply voltage is 12.5 Vdc ± 10%.
Flashing red indicates a program fault, parameter fault, or a faulty 125 MHz
oscillato
r
.
4 If H/U952T is connected to another u
n
it, the indicator should show a steady green
indication within 90 seconds.
If the indicator continues to blink green, check:
• Polarity of data bus(es)
• Connections on H/U952T
• That H/U952T is properly addressed
• That all sections of SW200 is set to OFF
If everything seems to be OK but the function ind
i
cator still blinks, the fault is
probably located outside H/U952T:
Check the other Ascom Paging units according to the System In
stallation document,
or contact your dealer.
5 If T952SM/FL module is used:
• Check that T938RM is connected as a Reference Modu
le if the Termi
nal
Transmitter is included in a frequency locked system.
• When frequency locking is used it should be locked to a reference frequency
wi
thin 20 seconds, the indicator on the T952SM/FL Speech and Frequency Lock
Module is lit red.
• Perform a speech test.
6 Initiate a paging from a unit. The LEDs TX ON and DATA ON lights momentarily, about
2.5 sec.
If not, cont
act your dealer.
7 Replace the cover.
When all other units are installed, perform the sys
t
em test described in the System
Installation document.
5.1 Field Adjustment
Reference frequency, VCO frequency and output power are all factory-set. If adjustments are
to be done, see Repair Manual, H/U952T Transmitter, TD 92023GB, chapter Alignment and
Adju
stment.

ASCOM H952T Specifications

General

Brand	ASCOM
Model	H952T
Category	Transmitter
Language	English