Tascam RC-898 owner manual External control and settings, Controlling the parallel port device

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Section 9.1 - Controlling the parallel port device

9 – External control and settings

This section covers the control of DTRS and other units.

9.1Controlling the parallel port device

When a unit is connected to the EXT 1 port [42] of the RC-898, the transport may be controlled usig the RC-898 transport controls. The pinouts for these transport controls are given in 3.2.2, “Parallel control/GPI pinout”.

To select the “parallel” unit for control:

1) Press the MACHINE key [31].

The LOCATE TIME/VALUE display will show

SELECT.

2) Press 7 on the numeric keypad.

The E1 indicator on the machine number indica- tors [8] will light, showing that the parallel port unit is now selected for control.

NOTE

The RC-898 provides only transport control for a unit con- nected to the parallel port. Functions such as track arming, etc. are not possible when using the EXT 1 parallel port.

9.2 Controlling GPI devices

Up to five GPI devices may be connected to the EXT 1 port. These devices may be triggered at set times, based on the times received for display on the TAPE TIME display of the RC-898.

Refer to the documentation supplied with any units to be controlled by GPI to find out whether the unit requires the controlling circuit to be closed or open in order to trigger the event, and the time of the pulse needed to act as a trigger.

The wiring for the parallel port when used with GPI devices is given in 3.2.2, “Parallel control/ GPI pinout”.

NOTE

Since the GPI event timings are based on the information transmitted from the DTRS recorders connected to the RC- 898, the timing may “slip” by up to one frame.

9.2.1 Setting up GPI devices

The polarity of the GPI devices, and the pulse width necessary to trigger an event, may be set up individually for each GPI device.

1)From menu group 1, move the cursor to GPI Setup and press SELECT:

G P I S e t u p

 

G P I

1

P o l

W i d t h

o p e n

0 1 0 m S

 

 

2)Holding down the SHIFT key, use the NEXT (UP) and PREVIOUS (DOWN) keys to select the required GPI unit.

3)Move the cursor to the Pol (polarity) field, and use the UP and DOWN keys to select either open or close for the polarity of the unit’s event trigger.

When open is selected, the event is triggered when the circuit is open (i.e. it is a “push-to- break”-type circuit. When close is selected, the event is triggered when the circuit is closed (i.e.it is a “push-to-make”-type circuit).

4)Move the cursor to the Width field and use the UP and DOWN keys to select the pulse width of the event trigger.

The minimum value for the pulse width is 0 ms, and the maximum is 990 ms, settable in 10ms increments.

Most GPI units require a trigger width of 200 ms. If you are unsure of the trigger width for a particu- lar device, we suggest that you try this value first of all.

NOTE

Note that the polarity setting here is also used as the polarity setting for transport control signals sent to the E1 parallel port device (see 9.1, “Controlling the parallel port device” . In this case, the pulse width is fixed at 500 ms.)

9.2.2 Setting the trigger points

The location memories also serve as GPI trigger points, when GPI devices are connected to the EXT 1 port.

Since up to 10 GPI events can be associated with location memories, we suggest the following method of working:

•Use a “block” of location memories for this purpose, starting at a number such as 80 or 90.

9-1

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Contents RC-898 For U.S.A RC-898 features Table of Contents IntroductionConnections Menu and basic operationsExternal control and settings Table of Contents Making settings on the Dtrs unitsTimecode functions Menu and parameter referenceKey features Key featuresIntroduction UnpackingPrecautions and recommendations Precautions and recommendationsBattery backup Digital audio cablesAccessories AccessoriesReference clock in a digital studio Accessories RC-898 features Front panel Lock Status indicators Machine number indicators Through 6, E1, E2Vari indicators Time Mode indicatorsData INC/DEC key and indicator Preset keyRepeat key and indicator Front panel ENTER/LOAD keyRear Panel Contrast Rear Panel DIP switches 1Connection to Dtrs units ConnectionsConnection to Dtrs units Machine IDsConnections RS-422 Units Connections parallel unitsConnections parallel units Connections GPI event unitsMemory and batteries Memory and batteriesMemory and batteries Navigation Menu and basic operationsNavigation Invalid operationsFast setting of values Resetting values to zeroSetting values using the Value display Data entryCommonly-used menus Selecting the unit controlled by the menusStoring and recalling user setups Storing and recalling user setupsRecalling menus using the function keys Saving the current setupRecalling a user setup or restoring factory settings Storing and recalling user setups Transport controls Basic Dtrs operationsSelecting the unit to which operations refer Formatting tapesMonitoring Shuttle modeMonitoring Arming tracksShuttle muting Shuttle monitoringMonitoring Monitoring flowchart DA-88 and DA-38 Monitoring Monitoring tablesMonitoring Setting a relative time reference Setting the precisionLocation functions Reference modesABS setting ABS settingSelecting Time Mode Return-to-zeroLocation operations Setting the location pre-roll valueLocation operations Auto playEditing a location Manual entry of a location pointStoring the location in a memory Recalling a location memoryRepeating a section Repeating a sectionRepeated entry of location points Editing a location memoryPunch operations Setting pre-roll and post-roll times Rehearsing the punch recordingCrossfade times Performing the punch recording Punch operations Track delay Making settings on the Dtrs unitsTrack operations Track operationsUnit-related functions Key ModeUnit-related functions Rec Mute functionAuto Offset function Chasing with an offsetClock selection Checking the offsetOutput timing From menu group E, move the cursor to eitherInput selection Varispeed pitch controlWord length DitherReference levels Unit-related functions Confidence modeMeter modes Sine oscillatorN e O s c i l l a t o r C h i n e Unit-related functions Primary timecode functions Timecode functionsPrimary timecode functions Selecting the timecode sourceSelecting a timecode type Setting the generator start timeRecording the timecode on a Dtrs timecode track Checking the generator progressRewind the tape to the beginning Start the timecode sourceChasing with a timecode offset Chasing to external timecodeAdvanced timecode functions Independent clock settingsAdvanced timecode functions Auto Timecode Offset functionRechase mode Error bypassSynchronization of timecode Pull up and pull downFast LTC Midi Timecode outputPark position Individual recording status while chasing timecode Video resolvePlay the master unit D e o R e s o l v e C h i n e O f f E e Advanced timecode functions External control and settings Controlling the parallel port deviceControlling GPI devices Controlling the serial port 9-pin Controlling the serial port 9-pinSelecting the serial port device Location pre-roll on the serial unitSerial unit timing source Split mode on the serial unitControlling recording operations on the serial unit Use the UP and Down keys to select between Split and NormalOther Dtrs control functions Other Dtrs control functionsChoosing a control protocol Track mapping functionsTimecode track mapping Recording delayRemote track arming Device emulationFast wind speed Cue-up tallyMMC ID D I / B u s I D C h i n e C e i v e Other Dtrs control functions Menu and parameter reference Menu groups Menu groupsMenu group GPI Time value to Timecode type Output All parameters On, off 7, Midi Time Fast wind mode Menu group E Menu group aMenu group F Alphabetical list of menu items Alphabetical list of menu itemsSpecifications DimensionsSpecifications Dimensions Dtrs Index A-EABS 6-2,8-2 Index F-OIndex P-T Generator 8-1,8-2,10-5,10-6 Index U-ZRC-898
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