Table 3-1. Front Panel Controls and Indicators-continued

TM 11-6625-3024-14/EE641-AC-MMA-010/E154 SYSEX/TO 33AA50-5-1-1

Table 3-1.

Front Panel Controls and Indicators (Continued)

Function

Control/Indicator

4K BLOCK

Selects either a short (256 bytes) or long (4096

bytes) block data when combined with BLOCK

MODE, WRITE, and RUN FORWARD functions.

SHIFT ONES

Produces a byte of all ones, then a one in each

subsequent track between the all ones byte. A

sync pattern of 16 bits of one-zero, followed by 16

ones, is available from the parity track. Used only

with WRITE, RUN FORWARD, and PAT. (pattern)

functions. This function recommended for skew

measurements.

Produces the recorded data block length of 256

BLOCK MODE

bytes, or 4096 bytes when 4K BLOCK has also

been selected. Used only with WRITE and RUN

FORWARD functions. Commands the Exerciser to

step through blocks incrementally when the

WRITE function is not selected, i.e., READ mode.

WRITE RESET

Indicates that a WRITE RESET command is sent

to the transport when pushed or lit.

Places the Exerciser and transport in a WRITE

WRITE

mode. A lighted WRITE indicator will cause new

data to be written on tape, when the RUN

FORWARD switch is enabled, providing the

transport is write enabled. Blocks or continuous

data may be selected in conjunction with the

WRITE command. Each block is ended with a CRC

and LRC word.

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