GLENSOUND ELECTRONICS LTD
G GLENSOUND ELECTRONICS LTD. Tel: +44 (0) 1622 753020
6 BROOKS PLACE, MAIDSTONE, KENT, ME14 1HE, ENGLAND +44 (0) 1622 753662
Fax: +44 (0) 1622 762330
GSOC24 & GSOC26 1U COAXIAL COMMS HANDBOOK CONTENTS Page 1 of 2
DATE 12/02/01 MW06-246 ISSUE No. 5
DESCRIPTION DRAWING No
GENERAL (Pink Sheets)
1. Commentators Equipment Warning Notes PT14-02
2. Co-Axial Commentators Equipment Information WP14-81
3. GSOC24 & GSOC26 Block Diagram A2-13900
4. Level Diagram A3-13853
5. Waveform on Co-Ax Line A3-14358
GSOC24
(Blue Sheets)
6. Information WP14-83
7. GSOC24 Views A2-13462
8. Block Diagram A4-13859
9. GSN36 Circuit Diagram A2-13854
10. GSN36 Logic Circuit Diagram A3-13855
11. GSN37 Mic Amp Circuit Diagram A2-13848
12. GSOC24 Gain Software Notes AP24-51
13. GSOC24 Automatic Gain Options A4-13849
14. GSN38 Line Interface & PSU Circuit Diagram A3-14676
15. GSN38 Receive & Send Amp Circuit Diagram A2-13857
16. GSN39 I/P Filter Circuit Diagram A3-13852
17. 25 Pin ‘D’ Connector Pin Outs A3-13850
18. IDC Leads Diagram A3-14384
19. IDC Conn 1 Lead GSN36 – GSN38 WP14-93
20. IDC Conn 2 Lead GSN36 – GSN37 WP14-94
GSOC26
(White Sheets)
21. Information WP14-86
22. GSOC26 Front & Rear Views A2-13726
23. Block Diagram A3-13725
24. GSN80 Mix & Monitoring Circuit Diagram A2-13920
25. GSN81 Monitoring Circuit Diagram A2-13922
26. GSN82 Rear Motherboard Circuit Diagram A3-13924
27. GSN83 Balance I/P Amp Circuit Diagram A4-13927
28. GSN84 Daughter Board Circuit Diagram A3-13928
29. GSN85 Line Send Output Daughter Board Circuit Diagram A4-13931
30. GSN87 Ident Daughter Board Circuit Diagram A3-13932
31. GSN88 TB Amp Circuit Diagram A4-13934
32. GSN89 LEDs Circuit Diagram A3-13936
33. GSN90 TB Switching Daughter Board Circuit Diagram A3-13938
34. GSN91 TX Circuit Diagram A3-13940
35. GSN92 RX Circuit Diagram A3-13942
36. GSN93 Master Timing Circuit Diagram A3-13944
37. Power Arrangements A4-14386
38. Interconnecting Subrack Monitoring WP14-84
39. On Air Logic Truth Table WP14-85
40. GSOC26 IDC Leads Diagram A3-14382
41. IDC Conn 6 Wiring Information WP14-87
42. IDC Conn 8 Wiring Information WP14-88
43. IDC Conn 9 Wiring Information WP14-89
44. IDC Conn 13 Wiring Information WP14-90
45. IDC Conn 14 Wiring Information WP14-91
46. IDC Conn 15 Wiring Information WP14-92
47. Wiring Information WP40-131
GLENSOUND ELECTRONICS LTD
G GLENSOUND ELECTRONICS LTD. Tel: +44 (0) 1622 753020
6 BROOKS PLACE, MAIDSTONE, KENT, ME14 1HE, ENGLAND +44 (0) 1622 753662
Fax: +44 (0) 1622 762330
GSOC24 & GSOC26 1U COAXIAL COMMS HANDBOOK CONTENTS Page 2 of2
DATE 12/02/01 MW06-246 ISSUE No.5
SPECIFICATIONS
(Yellow Sheets)
48. Commentators Unit Type GSOC24 Specification MW13-14
49. Commentators Base Station Type GSOC26 Specification MW13-15
50. Signals from Commentators Box GSOC24 to Base Station GSOC26 MW13-16
51. Signals from Base Station GSOC26 to Commentators Box GSOC24 MW13-17
52. Commentators Unit Coaxial Cable Specifications MW13-18
G GLENSOUND ELECTRONICS LTD
G GLENSOUND ELECTRONICS LTD. Tel: +44 (0) 1622 753020
6 BROOKS PLACE, MAIDSTONE, KENT, ME14 5HE, ENGLAND +44 (0) 1622 753662
Fax: +44 (0) 1622 762330
COMMENTATORS EQUIPMENT WARNING NOTES
DATE 29/01/98 FILE No PT14-02 ISSUE No. 1
There are two important points to be wary of in this equipment. Both are associated with
the fact that the Commentators Box is powered from the Base Station:-
1) Because current flows in the co-axial cable (aprox 300mAs) to power the
Box, it is inevitable that a potential difference will exist between the Box metalwork and
the Base Station metalwork. On a long line this can amount to several volts. If the
system is then tested with test equipment that shorts these two earths together, the system
can become severely upset and fail. It will resurrect itself when the earth loop is
removed.
2) If you test this equipment with the co-axial cable wound in a coil beware.
The coil of cable forms an inductance. This inductance has 300mAs flowing through it.
If the co-ax is then disconnected a large back EMF is produced. This is large enough to
give you an
* * * ELECTRIC SHOCK * * *
if you are holding the co-ax plug and socket.
G GLENSOUND ELECTRONICS LTD
Date 12/12/00 Information Sheet Number WP14-81 Issue Number 1
Page 1 of 1
G GLENSOUND ELECTRONICS LTD. 5&6 BROOKS PLACE, MAIDSTONE, KENT, ENGLAND.
CO-AXIAL COMMENTATORS EQUIPMENT
GENERAL INFORMATION
COMPATABILITY
This equipment is totally compatible with our previous range of units. In practice it is possible to use our original
GSOC4 commentator’s boxes with our new GSOC23 or GSOC26 base stations. It is equally possible to use our
new GSOC24 commentator’s boxes with any of our original base stations GSOC3, GSOC5 or GSOC8.
A number of additions and improvements are included in this range of equipment. The main difference is that the
commentators box GSOC24 now has provision for 3 instead of 2 commentators. Low voltage phantom power is
provided for each commentator to permit the use of modern headsets with electret microphones. Connectors for the
headset’s are now standardised with a 3 pin XLR fixed socket for the microphone and a standard tip, ring, sleeve
jack for the headphones.
Overall weight and size of the base station GSOC23 is considerably less than it’s predecessor GSOC3. Solid state
line ident recorders are now included for the main programme output and the co-ordination output of each channel.
SYSTEM
A system always consists of a base station and a number of commentator’s boxes. The GSOC23 base station can be
fitted with 1 to 5 channels to operate with 1 to 5 commentator’s boxes. The 1U base station type GSOC26 has
facilities for only a single commentator’s box. Each commentators box is connected to the base station with a single
75 ohm co-axial cable. The maximum length of this cable is 500metres.
TRANSMISSION
Time division multiplex is used to pass 3 audio signals from the commentators box to the base station as well as 7
audio signals from the base station to the commentators box. Simultaneously data is passed in both directions down
the co-axial cable and power is passed from the base station to the commentary box.
G GLENSOUND ELECTRONICS LTD
Date 12/12/00 Information Sheet Number WP14-83 Issue Number 1
Page 1 of 1
G GLENSOUND ELECTRONICS LTD. 5&6 BROOKS PLACE, MAIDSTONE, KENT, ENGLAND.
COMMENTATORS BOX TYPE GSOC24
GENERAL INFORMATION
COMPATABILITY
This commentators box is a development from our original GSOC4 commentators box. It is totally compatible with
our previous range of units. It is possible to use this new GSOC24 commentator’s boxes with any of our original
base stations type GSOC3, GSOC5 or GSOC8.
FACILITIES
Our sketch A2-13462 shows the panels of the GSOC24. It has provision for 3 commentators. Each commentator
can listen to 6 different audio sources. They can individually decide at what level and in what ear they wish to
monitor each source. There is a 7
th
hidden source namely talkback, which the commentators are forced to hear.
There are 3 internal presets that are used to set this talkback level to each commentator.
All three Commentators can toggle their microphones on or off to contribute to the main mix. Commentators A &
B can, in addition, talk to their ‘home’ or to the local technician using the co-ordination circuit. When the coordination button is pressed, the commentator’s microphone is automatically disconnected from the mix and fed
instead to the co-ordination circuit. Commentator C has no facility to talk to co-ordination. Input C can however be
switched to accept a line level input such as a tape machine, instead of a microphone. Twelve volt phantom power
can be switched to all 3 microphones. Because phantom power microphones generally have a higher output level
than dynamic microphones, we automatically reduce the mic amp gain when phantom power is switched on.
MIC AMP GAIN
All 3 microphone amplifiers contain a very sophisticated circuit to control the gain. This circuit uses a microcontroller to continuously monitor the input level and to only alter the mic amp gain after considering a complex
algorithm. In practice this means that you should be able to ignore the gain and let each mic amplifier look after
itself.
G GLENSOUND ELECTRONICS LTD
Apr 20th 2000
File AP24 - 51
Issue 1
TECHNICAL NOTES
Intelligent Gain Software in GSOC24 Commentators Boxes
GENERAL
The Glensound coaxial commentators equipment has limited dynamic range through the coaxial cable. It is
therefore advantageous to control the GSOC24 commentators box front end gain to optimise the signal to noise
ratio. Each channel input is therefore fitted with microcontroller controlled input amplier along with a limiter
circuit. The microcontroller makes decisions on the correct gain setting by observing how often and how hard
the limiter is asked to work as well as observing the input levels against a number of threshold levels. This
circuit does not respond rapidly but is designed to optimise the gains over a long time period. Operating the
phantom power switch always resets the system and sets the initial gain at a lower level for phantom powered
mics.
SOFTWARE VERSION 1.2
This version of software increases the speed of response and gives the customer options depending on links
available on the PCB.
Normal use is with no links made.
If the Pin 6 link is made then the unit will never increase its gain above the starting point, but will reduce the
gain if the level is perceived to be too high. This setting may be useful for noisy events.
If the Pin 4 link is made then the unit will never decrease its gain from the starting point, but will increase it if
the level is perceived to be too low. This may be useful for quiet events.
If both links are made the gain is fixed.
This fixed gain is nominally 57 dB for normal mics and 44 dB if the phantom power switch is on.
TO CHANGE LINKS
See drawing number A4-13849. This shows the location of each link on the PCB GSN37.
This PCB is located immediately behind the front panel XLRs.
The procedure is as follows:-
Remove front panel ( 4x Screws)
Withdraw the front panel assembly, then the bottom of GSN37 can be clearly accessed.
To make the links it is only necessary to dab them with a little solder and a hot soldering iron.
Replace the front panel.
FACTORY SET UP
Glensound always despatch the commentators boxes in the fully automatic mode. That is with no links made.
G GLENSOUND ELECTRONICS LTD
Date 09/12/00 Information Sheet Number WP14-93 Issue Number 1
Page 1 of 1
G GLENSOUND ELECTRONICS LTD. 5&6 BROOKS PLACE, MAIDSTONE, KENT, ENGLAND.
IDC CONN 1 LEAD GSN36 - GSN38
WIRING INFORMATION (GSOC24)
PIN No FUNCTION TYPE
1 A Co-ord On (High = On) Logic
2 Call Technician Logic
3 C Mic On (High = On) Logic
4 C Tape On (High = On) Logic
5 B Co-ord On (High = On) Logic
6 Call Home (High = On) Logic
7 -12v Supply
8 Co-ord LED
9 +12v Supply
10 A Mic On (High = On) Logic
11 +5v Supply
12 B Mic On (High = On) Logic
13 On Air LED
14
15 Co-ord LED
16
17 0v
18 No Connection
19 0v
20 TalkBack from Base Station Audio
21 0v
22 Feed Back from Base Station Audio
23 0v
24 Co-ord from Base Station Audio
25 0v
26 Guide 2 from Base Station Audio
27 0v
28 Guide 1 from Base Station Audio
29 0v
30 International Sound from Base Station Audio
31 0v
32 Mix from Base Station Audio
33 0v
34 0v
35 0v
36 B to Base Station Audio
37 0v
38 A to Base Station Audio
39 0v
40 C to Base Station Audio
G GLENSOUND ELECTRONICS LTD
Date 09/02/01 Information Sheet Number WP14-94 Issue Number 1
Page 1 of 1
G GLENSOUND ELECTRONICS LTD. 5&6 BROOKS PLACE, MAIDSTONE, KENT, ENGLAND.
IDC CONN 2 LEAD GSN36 – GSN37
WIRING INFORMATION (GSOC24)
PIN No FUNCTION TYPE
1 Mic/Line Switch (Low = High) Logic
2 B Right Ear Audio
3 B Left Ear Audio
4 0v
5 0v
6 C Right Ear Audio
7 C Left Ear Audio
8 0v
9 0v
10 A Right Ear Audio
11 A Left Ear Audio
12 0v
13 0v
14 B Mic Amp Out Audio
15 0v
16 A mic Amp Out Audio
17 +12v Supply
18 C Mic/Line Amp Out Audio
19 –12v Supply
20 +5v Supply
G GLENSOUND ELECTRONICS LTD
Date 12/12/00 Information Sheet Number WP14-86 Issue Number 1
Page 1 of 1
G GLENSOUND ELECTRONICS LTD. 5&6 BROOKS PLACE, MAIDSTONE, KENT, ENGLAND.
BASE STATION TYPE GSOC26
GENERAL INFORMATION
COMPATABILITY
This base station is totally compatible with our previous range of units. It is possible to use our original GSOC4
commentator’s boxes with this new GSOC26.
GENERAL
This base station is designed to operate with a single commentators box although provision is made to interconnect
a number of GSOC26s. Each commentators box has provision for three commentators. The GSOC26 can be used
either as a self contained unit that can produced a final mixed output, or as a unit interfaced with a standard control
desk. For this mode individual pre-fade outputs of the three commentators are provided.
The GSOC26 is mains operated and can operate on 110 to 240 v AC mains without tap changing.
Because the GSOC26 will normally be fitted in a vehicle or a nineteen inch equipment bay, all of the input and
output connectors are on the rear panel. There is not enough room for XLR type connectors so we have used D
connectors. The pin out of these connectors is shown in WP40-131
CONSTRUCTION
It is constructed in a 1U subrack. The panels are shown in drawing number A2-13726. Internally there are three
main PCBs as well as a number of daughter boards. Our drawing number A3-13725 is an attempt to show what
particular circuits are associated with each of these PCBs
Each daughter board provides a simple function and there are several instances where a number of identical
daughter boards are used. These daughter boards are soldered directly into the main boards. For maintenance
Glensound recommends replacing any faulty daughter board.
HANBOOK
This handbook gives individual circuit diagrams of each daughter board as well as other circuits that are constructed
directly on the three main PCBs.
G GLENSOUND ELECTRONICS LTD
Date 07/02/01 Information Sheet Number WP14-84 Issue Number 1
Page 1 of 1
G GLENSOUND ELECTRONICS LTD. 5&6 BROOKS PLACE, MAIDSTONE, KENT, ENGLAND.
INTERCONNECTING SUBRACK MONITORING
If more than one GSOC26 is used it is possible to interlock the monitoring facilities. This is
achieved by connecting a 9 way D lead between the subracks. Conn 6 on one subrack must be
connected to conn 7 on the other.
If this lead is fitted it is possible for the technician to use a single pair of headphones to monitor
all the GSOC26 units. The headphone socket of the last GSOC26 in the line will contain audio
monitoring from all of the GSOC26s. The monitor select buttons will interlock between the
subracks and the flashing LEDs will be synchronised.
The lead required has a plug on one end and a socket on the other. All 9 pins are wired in a 1 to 1
configuration. i.e. pin 1 is connected to pin 1, pin 2 to pin 2 etc. Any number of these leads may
be used to interconnect any number of subracks.
The function on each pin is as follows:-
P L U G S O C K E T
Pin 1 0v 0v
Pin 2 0v 0v
Pin 3 0v 0v
Pin 4 0v 0v
Pin 5 L selector switch logic L selector switch logic
Pin 6 R ear mix to next subrack R ear mix from last subrack
Pin 7 L ear mix to next subrack L ear mix from last subrack
Pin 8 Synchronise flashing LEDs Synchronise flashing LEDs
Pin 9 R selector switch logic R selector switch logic
G GLENSOUND ELECTRONICS LTD
Date 07/02/01 Information Sheet Number WP14-85 Issue Number 1
Page 1 of 1
G GLENSOUND ELECTRONICS LTD. 5&6 BROOKS PLACE, MAIDSTONE, KENT, ENGLAND.
COMMENTATORS BOX TYPE GSOC26
ON AIR LOGIC TRUTH TABLE
Facilities are provided on Conn 2 to interface the On-Air LED on the commentators box
GSOC24 with external logic. ie: If the A, B & C Prefade outputs are fed to an external mixer,
contacts on mixer faders can be used to operate the On-Air LED.
It is possible to make the LED solely dependant on the faders or solely dependant on the
GSOC26 switch or as a function of both.
The available combinations are as follows:
CONN 2
PIN 11
CONN 2
PIN 23
FRONT
PANEL
IDENT SWITCH
GSOC24
ON AIR
LED
LINK TO PIN 24 = LOW LINK TO PIN 10 = LOW PLAY ON
LINK TO PIN 24 = LOW LINK TO PIN 10 = LOW NORMAL ON
LINK TO PIN 24 = LOW LEAVE O.C = HIGH PLAY OFF
LINK TO PIN 24 = LOW LEAVE O.C = HIGH NORMAL OFF
LEAVE O.C = HIGH LINK TO PIN 10 = LOW PLAY ON
LEAVE O.C = HIGH LINK TO PIN 10 = LOW NORMAL ON
LEAVE O.C = HIGH LEAVE O.C = HIGH PLAY OFF
LEAVE O.C = HIGH LEAVE O.C = HIGH NORMAL ON
G GLENSOUND ELECTRONICS LTD
Date 08/12/00 Information Sheet Number WP14-87 Issue Number 1
Page 1 of 1
G GLENSOUND ELECTRONICS LTD. 5&6 BROOKS PLACE, MAIDSTONE, KENT, ENGLAND.
IDC CONN 6
WIRING INFORMATION (GSOC26)
PIN No FUNCTION TYPE
1 0v
2 Left to Next Subrack Audio
3 Left from Previous Subrack Audio
4 0v
5 Right from Previous Subrack Audio
6 Right to Next Subrack Audio
7 Flash Sync Logic
8 0v
9 Left Selector Switch Interlock Logic
10 Right Selector Switch Interlock Logic
G GLENSOUND ELECTRONICS LTD
Date 08/12/00 Information Sheet Number WP14-88 Issue Number 1
Page 1 of 1
G GLENSOUND ELECTRONICS LTD. 5&6 BROOKS PLACE, MAIDSTONE, KENT, ENGLAND.
IDC CONN 8
WIRING INFORMATION (GSOC26)
PIN No FUNCTION TYPE
1 No Connection
2 No Connection
3 Co-ord Pot Anti-clockwise Audio
4 Co-ord Pot Wiper Audio
5 0v
6 Feedback Pot Anti-clockwise Audio
7 Feedback Pot Wiper Audio
8 0v
9 4 Wire Pot Anti-clockwise Audio
10 4 Wire Pot Wiper Audio
11 0v
12 International Sound Pot Anti-clockwise Audio
13 International Sound Pot Wiper Audio
14 0v
15 Guide 1 Pot Anti-clockwise Audio
16 Guide 1 Pot Wiper Audio
17 0v
18 Guide 2 Pot Anti-clockwise Audio
19 Guide 2 Pot Wiper Audio
20 0v
G GLENSOUND ELECTRONICS LTD
Date 08/12/00 Information Sheet Number WP14-89 Issue Number 1
Page 1 of 1
G GLENSOUND ELECTRONICS LTD. 5&6 BROOKS PLACE, MAIDSTONE, KENT, ENGLAND.
IDC CONN 9
WIRING INFORMATION (GSOC26)
PIN No FUNCTION TYPE
1 0v
2 Right Feed to LS O/P Amp Audio
3 0v
4 Left Feed to LS O/P Amp Audio
5 No Connection
6 No Connection
7 No Connection
8 No Connection
9 No Connection
10 No Connection
G GLENSOUND ELECTRONICS LTD
Date 08/12/00 Information Sheet Number WP14-90 Issue Number 1
Page 1 of 1
G GLENSOUND ELECTRONICS LTD. 5&6 BROOKS PLACE, MAIDSTONE, KENT, ENGLAND.
IDC CONN 13
WIRING INFORMATION (GSOC26)
PIN No FUNCTION TYPE
1 Mic B LED On Logic
2 Mic A LED On Logic
3 Mic C LED On Logic
4 Tape C Led On Logic
5 0v
6 Mix to Comms Box Audio
7 0v
8 No Connection
9 0v
10 No Connection
11 0v
12 No Connection
13 0v
14 PGM Out Audio
15 0v
16 Co-ord Out Audio
17 Ring Loop
18 Ring Loop
19 0v
20 Comm to Co-ord Audio
21 0v
22 C to Fader Audio
23 0v
24 B to Fader Audio
25 0v
26 A to Fader Audio
G GLENSOUND ELECTRONICS LTD
Date 08/12/00 Information Sheet Number WP14-91 Issue Number 1
Page 1 of 1
G GLENSOUND ELECTRONICS LTD. 5&6 BROOKS PLACE, MAIDSTONE, KENT, ENGLAND.
IDC CONN 14
WIRING INFORMATION (GSOC26)
PIN No FUNCTION TYPE
1 0v Audio
2 Talkback @ -10 Audio
3 0v
4 0v
5 Comm Talkback Audio
6 4 Wire Talkback Audio
7 Short Circuit LED Drive Logic
8 Co-ord Talkback Audio
9 To Co-ord LED on Box Logic
10 Open Circuit LED Drive Logic
11 Comm Calls Home Logic
12 On Air LED Logic
13 Comm A Speak Logic
14 Comm Calls Technician Logic
15 Ring Comm Logic
16 Comm B Speak Logic
G GLENSOUND ELECTRONICS LTD
Date 08/12/00 Information Sheet Number WP14-92 Issue Number 1
Page 1 of 1
G GLENSOUND ELECTRONICS LTD. 5&6 BROOKS PLACE, MAIDSTONE, KENT, ENGLAND.
IDC CONN 15
WIRING INFORMATION (GSOC26)
PIN No FUNCTION TYPE
1 Mix Monitor Audio
2 Feed to LED PPM Audio
3 Line Monitor Audio
4 0v
5 Co-ord Out Monitor Audio
6 Comm to Co-ord Monitor Audio
7 Co-ord In Monitor Audio
8 0v
9 Feedback Monitor Audio
10 0v
11 4 Wire Monitor Audio
12 0v
13 IS Monitor Audio
14 0v
15 Guide 1 Monitor Audio
16 0v
17 Guide 2 Monitor Audio
18 0v
19 Prefade B Monitor Audio
20 0v
21 Prefade A Monitor Audio
22 0v
23 Prefade C Monitor Audio
24 0v
25 Technician Speaks on PGM Logic
26 0v
27 -10 Talkback Audio
28 0v
29 Speak to Co-ord Logic
30 Send Co-ord Ident Logic
31 Send PGM Ident Logic
32 Technician calls Co-ord Logic
33 PGM Ident Audio
34 Co-ord Ident Audio
GLENSOUND ELECTRONICS LTD
WIRING INFORMATION FOR GSOC26
CONN
No
TYPE FUNCTION
WIRED TO
TYPE
1 D9P Pre Fade outputs Printed down to GSN82
Pins 6,2 = PF A
Pins 3,8 = PF B
Pins 9,5 = PF C
Pins 1,4,7 = Screens Chassis
D25S
Main inputs & outputs 2 Printed down to GSN82
Pins 14,2 = FB (Feed Back) input
Pins 3,16 = Co-ord input
Pins 17,5 = Programme Line output
Pins 6,19 = Co-ord output
Pin 7 = 0v
Pin 20 = emitter ) opto coducts
Pin 8 = collector ) to call home
Pin 21 = 0v
Pin 9 = Low makes ‘CO-ORD’ LED flash
Pin 10 = 0v
Pin 23 = Low turns ‘ON AIR’ LED OFF
Pin 11 = Low makes pin 23 independent
Pin 24 = 0v
Pins 1,4,15,18 = Screens Chassis
3
D9P 4 Wire TB Circuits Printed do
w
n to GSN82
Pins 6,2 = 4W output
Pins 3,8 = 4W input
Pins 1,4,7 = Screens Chassis
D9S Misc inputs 4 Printed down to GSN82
Pins 6,2 = Guide 2 input
Pins 3,8 = Guide 1 input
Pins 9,5 = IS (International Sound) input
Pins 1,4,7 = Screens Chassis
5
D9P
Loudspeakers Printed down to GSN82
Pins 6,2 = LS A (Left) output
Pins 3,8 = LS B (Right) output
Pins 1,4,7 = Screens Chassis
Monitoring Links 6 D9P Printed do
w
n to GSN86
Pin 1 = 0v
Pin 6 = R ear mix to next subrack
Pin 2 = 0v
Pin 7 = L ear mix to next subrack
Pin 3 = 0v
Pin 8 = Synchronise flashing LEDS
Pin 4 = 0v
Pin 9 = ) Interlock selector switches
Pin 5 = ) between subracks
Monitorin7 D9S
g
Links Printed down to GSN86
Pin 1 = 0v
Pin 6 = R ear mix from previous subrack
Pin 2 = 0v
Pin 7 = L ear mix from previous subrack
Pin 3 = 0v
Pin 8 = Synchronise flashing LEDs
Pin 4 = 0v
Pin 9 = ) Interlock selector switches
Pin 5 = ) between subracks
NOTES 1) V = VARICON. D = D CONN. X = XLR. P = FIXED PLUG. S = FIXED SOCKET
2) TW = TWISTED WIRES, TP = TWISTED PAIR, SP = SCREENED PAIR, SS = SINGLE SCREENED WIRE
File Number WP40-131 Page 1 of 1 Date 27/07/99 Issue Number 2
G GLENSOUND ELECTRONICS LTD
Date 22/11/00 Specification Number MW13-14 Issue Number 5
Page 1 of 1
G GLENSOUND ELECTRONICS LTD. 5&6 BROOKS PLACE, MAIDSTONE, KENT, ENGLAND.
COMMENTATORS UNIT
TYPE GSOC24 SPECIFICATION
NOTES
The GSOC24 is a new improved version of our GSOC4. Entirely compatible with the original GSOC4 it can be
used with any original base stations (GSOC3, GSOC5 or GSOC8) as well as with our new GSOC23 base station.
INPUT IMPEDANCE
MICS A, B & C 1200 ohms
TAPE >50k ohms
INPUT SENSITIVITY (With base station faders at line up i.e. holding 10dB)
MICROPHONES A, B & C
The microphone inputs are intelligent. Input sensitivity is -63dBu to -47dBu when used without phantom power and
–51 to –34 when phantom power is selected. The gain is set by a microprocessor that will prevent the input hitting
the limiter too often but will keep the gain high enough for quiet commentators.
This circuit takes into account the background noise and will not alter the gain when the commentator stops
speaking. The gain will also not be changed when measuring with tone but will remain at the gain previously set
when used with speech.
TAPE C INPUT
A pad is inserted before the mic C input so that the intelligent input stage will then line up with signal levels
between -8dBu and +8dBu
PHANTOM POWER
+12 volts phantom power from a 2100 ohm source can be enabled by 3 front panel switches. One for each mic.
HEADROOM
A limiter follows the intelligent input stage and so the maximum input levels before clipping are, at minimum gain: Mic Inputs better than - 15 dBu
Tape Input better than +26 dBu
HEADPHONES
This equipment is designed to work with medium to high impedance headphones.
Max output is:- +18dBu into High Z
+16dBu into 300ohms
+12dBu into 100ohms
MIX OUTPUT (Rear Panel)
Level at line up -3dBu (depends on length of cable)
Impedance <65ohms transformer balanced
GUIDE 2 INPUT BREAK (Rear Panel)
Level -6dBu nominal
Impedance >50kohms electronically balanced
AUX B INPUT (Rear Panel)
Level 0dBu nominal
Impedance >50kohms electronically balanced
CONNECTORS
Microphone/Tape inputs XLR3 fixed sockets
Headphones Jack sockets that accepts A or B gauge jack plugs
Rear panel tape output XLR3 fixed plug
Rear panel Guide 2 break jack Bantem jack
Rear panel Aux B input Bantem jack
G GLENSOUND ELECTRONICS LTD
Date 22/11/00 Specification Number MW13-15 Issue Number 3
Page 1 of 1
G GLENSOUND ELECTRONICS LTD. 5&6 BROOKS PLACE, MAIDSTONE, KENT, ENGLAND.
COMMENTATORS BASE STATION
TYPE GSOC26 SPECIFICATION
NOTES
The GSOC26 is entirely compatible with our original GSOC4 commentators box as well as with our new improved
box type GSOC24.
POWER SUPPLY
Input connector IEC fixed plug
Operating voltage 110 to 240 volts AC without tap changing
Operating frequency 47-63 Hz
ALL OUTPUTS
Output Impedance 50-60 ohms electronically balanced
Normal load impedance High impedance
Minimum load impedance 600 ohms
Maximum output before clipping > +12dBu
ALL INPUTS
Input impedance > 50k ohms electronically balanced Acceptable input -20dBu
TECHNICIANS HEADPHONES
Impedance each ear 100 ohm to high Z
Connector Jack socket that accepts A or B gauge jacks
PROGRAMME AND CO-ORD LINE IDENT RECORDERS
Total message time 16seconds. Any unused time will be filled with 1KHz tone.
Level at output 0dBu programme (+8 peaks) with 0dBu line up tone
CALL HOME SIGNALLING ON CO-ORD CIRCUIT
An opto isolated loop closes for 5 seconds
HOME CALLS SIGNALLING ON CO-ORD CIRCUIT
On receipt of an earth loop box and base station are signalled
+20dBu
G GLENSOUND ELECTRONICS LTD
Date 21/09/99 Specification Number MW13-16 Issue Number 2
Page 1 of 1
G GLENSOUND ELECTRONICS LTD. 5&6 BROOKS PLACE, MAIDSTONE, KENT, ENGLAND.
SPECIFICATION FOR SIGNALS FROM COMMENTATORS
BOX TYPE GSOC24 TO BASE STATION TYPE GSOC26
NOTES
The GSOC24 is a new improved version of our GSOC4. It is entirely compatible with the original GSOC4 and can
be used with any of our original base stations (GSOC3, GSOC5 or GSOC8) as well as with our new base station
type GSOC26
LINE UP
All faders in the GSOC26 hold 10 dB at line up.
FREQUENCY RESPONSE
Frequency response is measured from, the MIC I/Ps of the Commentators unit, to the PGM O/P of the Base
Station.
Better than +1 / – 2dB from 40 Hz to 11kHz
NOISE
Noise is measured at the PGM O/P of the Base Station. Each base station fader set to line up in turn. Bandwidth is
20Hz to 20kHz. Measure with respect to output Line Up level. (normaly 0dBu). I/Ps are terminated in 300 ohms.
MICS at any gain ( 40 to 60dB) better than – 60dB unwtd quasi peak
DISTORTION
Total Harmonic Distortion is measured from, the MIC I/Ps of the GSOC24 to the PGM O/P of the Base Station.
I/P = - 60 to – 40dBu. Frequ = 300Hz to 3kHz. THD < 0.4%
CROSSTALK Co-ord out to PGM out
This is measured with mic A input at the GSOC24 set to produce a level of 0dBu at the programme output of the
GSOC26 with the A fader at line up. The other faders are closed. The mic A input is then removed and it’s input
terminated with 300 ohms. Tone is then fed to the co-ord input of the base station GSOC26 and it’s level set to
produce 0dBu on the monitoring meter. Crosstalk is then measured at the programme output using a narrow band
filter.
Crosstalk at 1kHz Less than –70dB
Crosstalk at 10kHz Less than –60 dB
G GLENSOUND ELECTRONICS LTD
Date 21/09/99 Specification Number MW13-17 Issue Number 2
Page 1 of 1
G GLENSOUND ELECTRONICS LTD. 5&6 BROOKS PLACE, MAIDSTONE, KENT, ENGLAND.
SPECIFICATION FOR SIGNALS FROM BASE STATION
TYPE GSOC26 TO COMMENTATORS BOX TYPE GSOC24
NOTES
The GSOC24 is a new improved version of our GSOC4. It is entirely compatible with the original GSOC4 and can
be used with any of our original base stations (GSOC3, GSOC5 or GSOC8) as well as with our new base station
type GSOC23
LINE UP
All levels to the commentators box are correct when preset using the LED column meter.
NOISE
Noise is measured into high impedance at the MIX output of the GSOC24 with a CCIR Quasi-peak meter. All
faders are closed and no signals are sent to the GSOC24.
< -58 dB CCIR unwtd quasi-peak
FREQUENCY RESPONSE
Frequency response is measured from the international sound input of the GSOC26 to the mix output of the
GSOC24. The international sound rotary fader is set to 12 o’clock and the international sound input level adjuster is
set to line up using the LED meter.
Better than +/- 2dB from 60 Hz to 11kHz
DISTORTION
Total harmonic distortion is measured from the GSOC26 international sound input to the GSOC24 mix output.
Levels should be set as for frequency response measurement.
Any frequency 300Hz to 3kHz THD < 0.5 %
CROSSTALK
Co-ord to Mix output. Tone is fed to the co-ord input on the GSOC26 and it’s level set to ‘PPM4’ on the LED
meter. Crosstalk is then measured at the mix output of the GSOC24 using a narrow band filter.
Crosstalk at 1kHz < -60dB
Crosstalk at 10kHz < -45dB
G GLENSOUND ELECTRONICS LTD
Date 21/09/99 Specification Number MW13-18 Issue Number 1
Page 1 of 1
G GLENSOUND ELECTRONICS LTD. 5&6 BROOKS PLACE, MAIDSTONE, KENT, ENGLAND.
COMMENTATORS UNIT COAXIAL CABLE SPECIFICATION
SPECIFICATION
One of the major features of the Glensound Electronics commentators equipment is its use of a single
coaxial cable to connect each box to the base station. This cable must meet certain specifications for the
system to perform correctly. The loop resistance, the delay and the frequency response of the cable are
the limiting features. To enable customers to determine the suitability of any cable the following is the
specification to be met by the total length of cable between any commentators box and the base station.
LINK SPECIFICATION
Connectors are: UHF fixed sockets (BNC to special order)
Cable Impedance 75ohms
Maximum DC loop resistance 22ohms
Maximum delay 2.5microseconds
Maximum attenuation 15dBs at 10MHz
This equipment has been tested with several different proprietary cables.
SATISFACTORY CABLES
1) Heavy Duty Cables suitable for use up to a full 500 metres
BBC Code PSF1/2M
Brand Rex GT-651
Canford Audio 36-362
2) Lighter Duty Cables suitable for use up to 250 metres
BBC Code PSF1/3M
Brand Rex GT-851
Canford Audio 36-366
3) An Extra Flexible light duty cable available in several colours and suitable
for use up to 250 metres
Canford Audio 36-372 Red
36-374 Yellow
36-375 Green
36-376 Blue
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