Nautel VR-Link, Technical Instruction Manual

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Page 4-2
VR-Link Technical Instruction Manual
Issue 0.6 Section 4 Troubleshooting
4.2.2 No Control/Monitor Response
If the Vector transmitter is not responding to
user commands or incorrect information is
being displayed via the VR-Link, there are
three possible causes.
(a) There is no connection between the
VR-Link and the Vector transmitter (see
4.2.1).
(b) A connection is established but neither
the Netburner web page or ECMPs can
control the Vector. If this is the case, the
information on the ECMPs and/or
Netburner web page should be accurate.
It is most likely that the Vector has been
left in
LOCAL command.
If all controls seem to work except the
RF ON command, it is likely that the RF
has been switched OFF at a remote
location. This will only apply if the
ECMPs are connected and configured
as described in section 3 of this manual.
(c) A connection is established and the
Netburner web page is functioning but
the ECMP is not. Check the following:
•
Ensure the correct supply voltage (9 -
15 V dc) is applied to the ECMP.
•
Ensure the proper connections are
made between the VR-Link and any
attached ECMPs (see 2.3.3.1).
•
Verify that the ECMP is configured
correctly in the Netburner web page.
•
Verify that the ECMP is programmed
with the correct firmware. The ECMP
should have a programming sticker on it.
•
If all the above are OK, there may be
board level fault. See the ECMP
Technical Instruction Manual for more
troubleshooting information.
4.2.3 Power Supply Voltages
If there is a suspected supply problem for
any component of the VR-Link, check the
followings:
(a) Check the back of the VR-Link. The
Netburner module (U3) should have
LEDs turned on. If not, verify that its
power plug (W1P1) is connected.
(b) Check that ac power is connected to the
VR-Link (at U2) and the correct voltage
is being applied. This can be measured
between terminals 1 (line) and 2
(neutral) of ac-dc power supply U1. The
VR-Link is rated for 100 – 240 Vac.
(c) Remove ac power and check the fuse
located in power entry module U2. If the
fuse is blown replace the fuse. Make
sure the new fuse is the same rating
(2 A, 250 V). Also, measure the
resistance on ac/dc power supply’s U1’s
ac input to ground and dc output to
ground to check for possible shorts.
Visually inspect for loose wires or burnt/
damaged components before reapplying
power to the VR-Link.
(d) Remove the top cover from the VR-Link
and check for loose or disconnected
wires. With ac power applied, measure
the +5 V and +15 V dc supplies at
A1TB2-1 and A1TB2-2 respectively. If
there is no voltage at A1TB2, measure
the dc voltage outputs of U1, then
measure the ac input to U1. If there is ac
input but no dc output, replace U1.