MECHANICAL
Standard Crystal Vision module 266mm x 100mm
Weight: 200g
Power consumption: 11.9 Watts; 0.6 Watts (FIP and FOP)

VIDEO INPUT
One 3Gb/s or HD or SD input
When using FIP fibre input option allows selection between one optical and one electrical input
270Mb/s or 1.5Gb/s or 3Gb/s serial compliant to EBU 3267-E, SMPTE 259, SMPTE 292-1 and SMPTE 424/425-A
The video formats supported are 625, 525, 720p50, 720p59.94, 1080i50, 1080i59.94, 1080p50 and 1080p59.94
3Gb/s cable equalisation up to 80m using Belden 1694A. HD cable equalisation up to 140m with Belden 1694A or equivalent (approx. 100m with Belden 8281). SD cable equalisation >250m Belden 8281 or equivalent
Input return loss: -15dB for 50MHz to 1.5GHz and -10dB for 1.5GHz to 3GHz
Automatic de-embedding to SMPTE 272M or SMPTE 299M

VIDEO OUTPUTS
Using RM47 and RM49 rear modules: Two 3Gb/s, HD or SD outputs
Using RM60 and RM61 rear modules with FIP fibre input option: One 3Gb/s, HD or SD output
Using RM60 and RM61 rear modules with FOP fibre output option: Two 3Gb/s, HD or SD outputs (one on fibre and one on BNC)
Using RM70 rear module with FIP fibre input option: Two 3Gb/s, HD or SD outputs
Using RM70 rear module with FOP fibre output option or FIO fibre input and output option: Three 3Gb/s, HD or SD outputs (one on fibre and two on BNC)
Serial output: 270Mb/s or 1.5Gb/s or 3Gb/s serial compliant to EBU 3267-E, SMPTE 259, SMPTE 292-1 and SMPTE 424/425-A. Output follows the input format
Audio is embedded to SMPTE 272M or SMPTE 299M

INTEGRATED FIBRE OPTIONS
TANDEM 3G can be given integrated fibre connectivity by fitting the FIP fibre input option, FOP fibre output option or FIO fibre input and output option. The chosen option should be fitted at the factory
To access the optical inputs or outputs an RM60 (for 110 ohm AES), RM61 (for 75 ohm AES) or RM70 (for 110 ohm AES) frame rear module must be used
When fitted with a FIP, FOP or FIO, TANDEM 3G can be housed in any frame slot position but due to its extra height it is not possible to place Standard Definition or audio boards directly above it when the TANDEM 3G is in even numbered slot positions. 3Gb/s and HD boards do not share this restriction.
FIP, FOP and FIO meet the SMPTE 297-2006 short-haul specification, allowing operation with single-mode and multi-mode fibre
Connector type: SC/PC
FIP or FIO input:
Optical wavelength: 1260-1620nm
Input level maximum: 0dBm
Input level minimum: Typical -20dBm (-18dBm 3Gb/s pathological)
FOP or FIO output:
Optical power: Max -0dBm, min -5.0dBm (typical -2.0dBm or 630uW)
Fibre pigtail: Single-mode 8/125uM
Optical wavelength: 1290-1330nm (1310 typical)
Extinction ratio: 7.5dB
Laser safety classification: Class 1 (EN 60825), Class I (21CFR1040.10)

AUDIO INPUTS AND OUTPUTS
Eight bi-directional digital audio I/O ports on the board can each be independently configured to be either an AES input or AES output 24 bit stereo pair. This allows the embedding or de-embedding of up to eight AES at the same time and in any combination
TANDEM 3G can embed or de-embed synchronous 48kHz AES, asynchronous 48kHz AES and synchronous Dolby E. Linear AES can be resampled. Dolby E cannot be resampled. A manual resampler on/off  control allows TANDEM 3G to embed synchronous compressed audio such as AC3
110 ohm or HiZ (balanced) via D-Type, or AES3-id (unbalanced) via 75 ohm BNC
The four output embedders can be individually enabled or disabled, allowing any other data already present on the input video to be retained for downstream use

dELAY THROUGH BOARD
Minimum video in to out delay: 2 lines (HD) and 4 lines (SD)
Minimum embedding audio delay: 2ms

VIDEO DELAY
Optional one frame (33.3ms or 40ms) or two frames (66.6ms or 80ms) video delay allows compensation for Dolby E encoding and decoding

AUDIO DELAY
Adjustable audio delay of up to 80ms on each stereo pair of linear AES or Dolby E will compensate for any small delay between the incoming video and audio signals. Delay is either on or off for any given stereo pair

aUDIO REPLACE
TANDEM 3G has two 32 input/16 output mono audio routing matrices. One is the embedder output router, with the other the AES output router
These allow up to 32 audio channels (16 embedded channels from up to four groups present on the input video, plus up to eight external stereo pair AES inputs) to be routed to 16 outputs for either embedding into up to four groups on the output video, or up to eight external stereo pair AES outputs
HANC cleaning removes the original version of old groups

AUDIO PROCESSING
Audio processing can be applied to linear AES only. It cannot be applied to Dolby E
Gain level adjustment on each channel between +18dB and -18dB in 0.1dB steps with 0dB calibration. There are a total of 32 audio gain controls, for the 16 channels of audio de-embedded from the video audio and 16 channels of external AES audio
Mute
Inversion
Stereo to mono conversion

VIDEO PROCESSING
Video proc-amp for picture optimisation, with adjustment of the video gain, black level and independent YUV gains, with a maximum increase of 200%

DELAY THROUGH BOARD
Less than one line

AUXILIARY DATA
Auxiliary data passed unless set to blank (by enabling VANC blanking)

LED INDICATION OF:
Power supplies on board
Video input HD/SD
Input audio groups present
Gains not calibrated
GPI output 6 active

PRESETS
The current board settings can be saved in one of 16 locations to be recalled as required

GPI INPUT LEVELS
Active: pull to ground, pulled up to +5V through 10 kohm

GPI OUTPUT LEVELS
Electrically: Open collector transistors 30V, 270 ohm current limit resistors. Pulled up to +5V through 6800 ohm

GPI INPUTS
Four GPI inputs can be used to recall stored presets

GPI OUTPUTS
One GPI output (GPI 6) is reserved for alarm indication. It may be assigned any number of 37 video and audio alarms:
Video missing
Input group 1 missing
Input group 2 missing
Input group 3 missing
Input group 4 missing
Silence group 1 channel 1 and 2
Silence group 1 channel 3 and 4
Silence group 2 channel 1 and 2
Silence group 2 channel 3 and 4
Silence group 3 channel 1 and 2
Silence group 3 channel 3 and 4
Silence group 4 channel 1 and 2
Silence group 4 channel 3 and 4
Silence AES 1
Silence AES 2
Silence AES 3
Silence AES 4
Silence AES 5
Silence AES 6
Silence AES 7
Silence AES 8
Dolby E on input group 1 channels 1 and 2
Dolby E on input group 1 channels 3 and 4
Dolby E on input group 2 channels 1 and 2
Dolby E on input group 2 channels 3 and 4
Dolby E on input group 3 channels 1 and 2
Dolby E on input group 3 channels 3 and 4
Dolby E on input group 4 channels 1 and 2
Dolby E on input group 4 channels 3 and 4
Dolby E on AES 1
Dolby E on AES 2
Dolby E on AES 3
Dolby E on AES 4
Dolby E on AES 5
Dolby E on AES 6
Dolby E on AES 7
Dolby E on AES 8
The silence alarms can be delayed before an alarm is asserted to prevent false alarming during quiet audio periods s

LOCAL CONTROL
Intuitive board edge interface with two select buttons, shaft encoder and ten character alphanumeric display

REMOTE CONTROL
RS422/485
19200 baud, 8 bits, 1 stop no parity
Control from frame active front panel and remote panel
Statesman allows control from any PC on a network
SNMP monitoring and control available as a frame option