SIGMA ELECTRONICS, INC.
BSG-26 SERIES
INSTRUCTION MANUAL
WARNING: To reduce the risk of fire or electric shock, do not expose this apparatus to rain or moisture.
GENERAL:
The BSG-26N and BSG-26P are Black Signal Generators which provide six (6) blackburst signal outputs. The outputs are driven from the same internal source to ensure system synchronization. The design of the units provides suitable operation for applications from complex total system timing to laying black on tape. The blackburst signal is digitally derived from a temperature compensated oscillator. These units provide a stable output and do not require any adjustments during operation. The outputs are present when power is applied.
Superblack operation is selective via J1. With J1 jumper shorted across pins 1 and 2, the module will produce superblack on all outputs. Superblack can be used when building a Multi-Pass special effect. The superblack signal, approximately -7.5 IRE, provides a noiseless background that can be laid down on the tape for this application.
The BSG-26N, NTSC version, provides outputs per RS-170A / SMPTE 170M standards. The BSG-26P, PAL version, provides outputs per CCIR 624-4 standards. Specifications are provided in the SPECIFICATIONS section.
POWER:
The BSG-26 Series accommodates a wide range of line voltage from 90 VAC minimum to 255 VAC maximum. The line frequency range is 50 to 60 Hz. The units utilize an IEC 320 inlet to accommodate the proper power cord set for the line voltage connectors used in any geographical area. The combination of the wide voltage range and universal inlet contributes to the diversity of applications where the BSG-26 will supply a dependable source of black signal. The module internally regulates the bus voltage to +5 VDC (U8) and -5 VDC (U9). Circuit protection is provided by an externally accessible fuse (Figure 1).
FRAMES:
The BSG-26 units are assembled in a stand-alone box. The metal enclosure provides desirable shielding from external EMI / RFI noise sources. See the section on SPECIFICATIONS for recommended operational conditions. The units are capable of rack mounting with the optional RMK-26 Rack Mount Kit. This 1RU rack mount does not require blank panels for unused portions. A total of three (3) Series 26 units may be mounted with a single RMK-26.
CONNECTIONS:
The connectors are located on the rear panel. BNC connectors are used for the six outputs. Each of the outputs are designed to drive a 75 Ohm load. The outputs must be terminated by a single end of line 75 Ohm termination to ensure proper signal level. Unused outputs do not require a 75 Ohm terminating resistor.
1 | 2 | 3 | | 4 | 5 | 6 |
100-240V~ | | OUTPUTS | FUSE | | |
| T40mA | | CAUTION |
50-60Hz | | | | 250V | | RISK OF ELECTRIC SHOCK |
6W | | | | | DO NOT OPEN |
| | | | | |
BSG-26 | C | UL | US | | SIGMA ELECTRONICS, INC. |
| |
REAR PANEL
Figure 1
