Broadcast Tools B031 User manual

B031
DUAL PILOT TONE DETECTOR
Handbook Version 0.8

Dual Pilot Tone Detector B031
2007 dB Broadcast Ltd
dB Broadcast Ltd has made every effort to ensure the accuracy of information contained within this
document which is nevertheless supplied for information purposes only and does not constitute any
form of warranty or guarantee.
All trademarks acknowledged.
The information in this document is subject to change without notice.
dB Broadcast Ltd
Registered Office:
Kestrel House
Sedgeway Business Park
Witchford
Ely
Cambridgeshire
CB6 2HY
UK
Tel: [phone]
Fax: [phone]
Email: [e-mail]
Web: www.dbbroadcast.co.uk
Registered in England No. 2709677

Dual Pilot Tone Detector B031
2007 dB Broadcast Ltd
D
Do oc cu um me en nt th hi is st to or ry y
Date of first publication 28/03/2007
Current issue and date 0.8 / 28th March 2007
Board issue numbers
covered

Dual Pilot Tone Detector B031
2007 dB Broadcast Ltd
C
Co on nt te en nt ts s
INTRODUCTION 1
Main Features 2
INSTALLATION 3
SELECTING REAR CONNECTORS 3
Rear Panel Connections 4
CONFIGURATION AND OPERATION 5
Front Panel Control 5
CONFIGURATION 6
Channel A main module adjustments 6
Channel B main module adjustments 6
Timer module adjustments 7
SAMPLE PROBLEMS AND THEIR SOLUTIONS 9
ORDERING INFORMATION 10
SPECIFICATION 11

Dual Pilot Tone Detector B031 Introduction
2007 dB Broadcast Ltd 1 Version 0.8
I
In nt tr ro od du uc ct ti io on n
The B031 Dual Pilot ToneDetector module has dual balanced audio inputs with independent
detector circuits. It fits in 1U or 3U Vistek frames and power is derived from the frame
PSU(s).
The B031 Dual Pilot Tone Detector
The input impedance is selectable to either 600or 50k. The detection threshold is set by
DIL switches in 0.5dB steps from -10dB to -33dB and a further adjustment of +/- 10dB via the
front panel.
The front panel LED's indicate undelayed and delayed tone failure.
The undelayed tone indication will operate immediately tone is lost, and the delayed tone
indication will operate following tone loss for a preset time. The delayed tone indication will
extinguish once the signal returns continuously for a preset time period. The good to fail time
delay period can be adjusted in 1 second steps between 0-15 seconds. The fail to good time
delay period can be adjusted in 0.1 second steps between 0-1.5 seconds.
Undelayed remote status signals are provided as peripheral driver outputs and the delayed
remote status signals as isolated relay contacts.
The module is DART compatible and provides monitoring status to the DART Bus.

Dual Pilot Tone Detector B031 Introduction
2007 dB Broadcast Ltd 2 Version 0.8
Main Features
Dual pilot tone detector for Vistek frames
Inputs may be terminated with 600or Hi –Z (50k)
Front panel indications for pilot tone fail (undelayed and delayed) for each channel
Peripheral driver output for undelayed tone fail and isolated relay outputs for delayed
tone fail and tone OK
Adjustable delayed tone fail onset and reset timing
Front panel fine adjustment for tone level loss threshold
Internal coarse adjustment for tone level threshold and tone frequency sensitivity
DART monitoring capable as standard

Dual Pilot Tone Detector B031 Installation
2007 dB Broadcast Ltd 3 Version 0.8
I
In ns st ta al ll la at ti io on n
Selecting Rear Connectors
The available rear connectors and the frames/signal I/O used are as follows:
Type Frame Connectors Signal types
VB130 1U(F010)/3U
Vistek 3-pin screw terminal Analogue audio
3U Vistek style
chassis VB130

Dual Pilot Tone Detector B031 Installation
2007 dB Broadcast Ltd 4 Version 0.8
Rear Panel Connections
SIGNAL CONNECTOR COMMENTS
A1 3 pin screw Not used
A2 3 pin screw Not used
A3 pin screw Input 1
B1 3 pin screw Not used
B2 3 pin screw Not used
B3 pin screw Input 2
Control and Status - 26 way D type
PIN SIGNAL (pins 1 –13) PIN SIGNAL (pins 14 – 26)
10V CTL A 14 0V SUPPLY GROUND
20V CTL A 15 SPARE
30V CTL A 16 SPARE
40V CTL A 17 B TONE FAIL (DELAYED)
5A TONE OK (UNDELAYED) 18 B TONE OK (DELAYED)
6A TONE OK (UNDELAYED) 19 DELAYED COMMON
7DELAYED COMMON 20 DELAYED COMMON
8DELAYED COMMON 21 B TONE OK (UNDELAYED)
9A TONE OK (DELAYED) 22 B TONE OK (UNDELAYED)
10 A TONE FAIL (DELAYED) 23 0V CTL B
11 SPARE 24 0V CTL B
12 SPARE 25 0V CTL B
13 0V SUPPLY GROUND 26 0V CTL B

Dual Pilot Tone Detector B031 Configuration and Operation
2007 dB Broadcast Ltd 5 Version 0.8
C
Co on nf fi ig gu ur ra at ti io on na an nd dO Op pe er ra at ti io on n
Front Panel Control
LED Indicators:
DYellow – Flashing indicates DART monitoring is active
VGreen – Indicates DC power present & OK
Sig Fail Yellow – Immediate signal loss indication
Delay Red – Delayed signal loss indication
Controls:
Threshold Pilot tone loss threshold adjustment
Vistek
LED Ext Alrm Meaning when lit or active
Sig Fail Tone OK (Undel)
– Peripheral
driver
Pilot tone detected – tone level below threshold set
by Threshold A (CHA) and Threshold B (CHB)
and/or module settings. See Configuration section.
Delay Tone Fail (Del) -
Relay Pilot tone loss detected (delayed) – tone level below threshold set by RV1/S1 (CHA) and RV2/S2 (CHB)
None Tone OK (Del) -
Relay Pilot tone detected (delayed) – tone level above threshold set by RV1/S1 (CHA) and RV2/S2 (CHB)
Note: Sig Fail is the opposite sense to Tone OK (Undel).

Dual Pilot Tone Detector B031 Configuration and Operation
2007 dB Broadcast Ltd 6 Version 0.8
Configuration
Each channel has a number of configuration jumper links and adjustments.
The B031 Dual Pilot Tone Detector showing jumper links
Channel A main module adjustments
Adjustment Main Module - Channel A
JP1 Select 600termination or high impedance (50k).
JP2 - 5 Place the jumpers in the 19kHz (left) or 22.5kHz (right) position for the pilot
tone sensitivity required.
S1 Set DIL switch levers for the coarse tone loss threshold level required –
see table on page 8.
RV1 Front panel adjustment for fine control of tone loss threshold (+/- 10dB).
JP6 Move this link to the top for floating common ground.
Move this link to the bottom for grounded common ground.
Channel B main module adjustments
Adjustment Main Module - Channel A
JP7 Select 600termination or high impedance (50k).
JP8 - 11 Place the jumpers in the 19kHz (left) or 22.5kHz (right) position for the pilot
tone sensitivity required.
S2 Set DIL switch levers for the coarse tone loss threshold level required –
see table on page 8.
RV2 Front panel adjustment for fine control of tone loss threshold (+/- 10dB).
JP12 Move this link to the bottom for floating common ground.
Move this link to the top for grounded common ground.
Note: Carrier Null and PLL Adjust are factory set and should not require re-adjustment.