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Resumen del manual
As the VCR records signals through its A/V input, such as from a video camera and microphone, it outputs the same signals back into the system. The FBI 100 prevents the audio feedback loop, represented as a progressively loud tone that can occur if the VCR output signal is routed back into its A/V input via a switching system. For example, feedback is likely to occur in a videoconference environment when mixed audio from the videoconference session is simultaneously recorded and introduced back into the system as an active source. In record mode, the FBI 100 prevents feedback loops by directing the information to be recorded specifically to the VCR's A/V input while isolating the VCR output from the rest of the system. For other VCR modes, such as playback and stop, the VCR outputs to the A/V system as normal. Contact closure control provides a simple means of selecting the record or playback/stop mode of the FBI 100. Part of the VersaTools® line of small, economical, integrator friendly products, the FBI 100 is housed in a 1U, quarter rack width metal enclosure. specifications video_ Gain................................ Unity Bandwidth........................ 10 MHz (-3 dB) video input_ Number / Signal type......................2 composite video Connectors..............................................2 female BNC Nominal level........................................1 Vp-p for composite video (including sync) Minimum / Maximum levels... Analog: 0.3 V to 1.5 Vp-p with no offset Impedance................................................75 ohms Input coupling........................................DC Number / Signal type........... 2 composite video Connectors ....................... 2 female BNC Nominal level .................... 1 Vp-p for composite video (including sync) Minimum / Maximum levels... Analog: 0.3 V to 1.5 Vp-p with no offset Impedance........................ 75 ohms sync Standards......................... NTSC 3.58, NTSC 4.43, PAL, SECAM audio Gain Overall (from "From Source" to "To Destination").................. Unbalanced output: -6 dB; balanced output: 0 dB From "From Source" to "To VCR In"........................ -12 dB From "From VCR Out" to "To Destination"................... Unbalanced output: +6 dB; balanced output: +12 dB Frequency response ............ 20 Hz to 20 kHz, ±0.05 dB THD + Noise...................... 0.03% @ 1 kHz at nominal level S/N ................................. >90 dB at maximum output (unweighted) Stereo channel separation .... >80 dB @ 1 kHz, >60 dB @ 20 kHz CMRR .............................. >75 dB @ 20 Hz to 20 kHz audio input Number / Signal type "From Source" .................... 1 stereo balanced/unbalanced "From VCR Out"................... 1 stereo, unbalanced Connectors "From Source" .................... (1) 3.5 mm captive screw connector, 5 pole "From VCR Out"................... 1 pair RCA Impedance........................ >12k ohms unbalanced, 24k ohms balanced, DC coupled Nominal level "From Source" .................... +4 dBu (1.23 Vrms) "From VCR Out"................... -10 dBV (316 mVrms) Maximum level "From Source" .................... +27 dBu, (balanced) at 1% THD+N "From VCR Out"................... +11 dBV, (unbalanced) at 1% THD+N Input coupling.................... DC audio output Number / Signal type "To VCR In" ........................ 1 stereo, unbalanced "To Destination"................... 1 stereo, balanced/unbalanced Connectors "To VCR In" ........................ 1 pair RCA "To Destination"................... (1) 3.5 mm captive screw connector, 5 pole Impedance........................ >50k ohms unbalanced, 100k ohms balanced, DC coupled Maximum level "From Source" .................... +25 dBu, balanced at 1% THD+N "From VCR Out"................... +11 dBV, unbalanced at 1% THD+N control / remote — feedback isolator CP Control Port .................. (1) 3.5 mm captive screw connector, 2 pole contact, controlled by an external control system. general External power supply ......... 100 VAC to 240 VAC, 50/60 Hz, external, to 12 VDC, 1 A (max), regulated Power input requirements..... 12 VDC, 0.2 A Rack mount ...................... Yes, with optional rack shelves (See optional accessories.) Enclosure type ................... Metal Enclosure dimensions .......... 1.7" H x 4.4" W x 3.0" D (1U high, quarter rack wide) 4.3 cm H x 11.3 cm W x 7.6 cm D (Depth excludes connectors) model version description_PART # VCR Feedback Loop Isolator........................................................................... 60-743-01 model description_page_part # 1U 3.5" Deep VersaTools® Rack Shelf Kit..........................................page 818 60-190-20 1U 3.5" Deep Basic Rack Shelf.....................................................page 818 60-604-20 VersaTools® Mini Under-Desk Mount Kit............................................page 815 70-212-01 One Ver...