EG&G ORTEC 476 Gebrauchsanweisung - Seite 11

Blättern Sie online oder laden Sie pdf Gebrauchsanweisung für Multiplexer EG&G ORTEC 476 herunter. EG&G ORTEC 476 14 Seiten. Multiplexer/routar

mined by the jumpers (see Section 3.5). No other transfer

signals are used in the 6240B, so the remaining signals

are of no consequence.

If the 7010/6240B jumper has been set at 7010, the input

strobe from the analyzer must be a high level signal.

IC27-8 must have been enabled as described above, and

its output switches to low when the strobe is furnished.

The low at IC27-8 enables the OR gates in 1018 to transfer

the coded routing signal. It also provides the BM1 output

(if the jumper is set as shown in schematic 476-0201-SI)

to identify this as a PHA request to the analyzer. These

signals are used only when an EG&G ORTEC 800 ADC is

connected to a 7000 Series analyzer in parallel with the

476. When the 800 ADC generates an ADC READY, it

passes through the 476 to generate a FERDY signal to the

7000 to indicate that the 800 ADC has data ready to trans

fer to the 7000. The 7000 then generates a strobe signal to

gate the routing information onto the FED lines: it is also

inverted and passed to the 800 ADC as an ADC STRCBE

to place the address information in the ADC onto the

low-order FED lines. A CCMP signal from the 7000 indi

cates that the address transfer is finished and this signal

is inverted and passed to the 800 ADC as a TXCCMPLETE

signal.

5.6. INTERNAL POWER DISTRIBUTION

The circuits of the 476 require operating do power levels

at ±12 V and ±24 V, furnished directly from the bin power

supply, and at +5 V. The +5 V level is derived from the

+12 V input through regulator IC41.

FACTORY SERVICE

This instrument can be returned to the EG&G CRTEC

factory forserviceand repair at a nominal cost. The EG&G

CRTEC standard procedure for repair ensures that the

same quality control and checkout procedures that are

used for a new instrument will be used for the repaired

unit. Always contact Customer Services at EG&G

CRTEC, (615) 482-4411, before sending in an instrument

for repair to obtain shipping instructions and so that the

required Return Authorization Number can be assigned

to the unit. This number should be written on the address

label and on the package.