CANOGA PERKINS 2240 Fiber Optic Modem - Manual (Page 54)

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Canoga Perkins
4.4.8 CTS (A) Jumper
This jumper selects the electrical characteristic of the CTS (A) lead. In the
NORM position, the CTS (A) is a normal RS-422 balanced driver, as per RS-530.
The KG position is intended for interfacing to cryptography equipment. If you are
not interested in KG applications, leave this jumper in the factory NORM position
and skip the following KG jumper settings for the -430 interface.
In the KG position, CTS (A) follows the DTR input at the far end and the output is
driven by an unbalanced driver whose output voltage swing is controlled by the
KG_SWING jumper and whose sense is controlled by the KG_OUT jumper.
Factory Setting = NORM
4.4.8.1 KG_SWING Jumper
This jumper selects the output swing for the CTS (A) lead when the CTS (A)
jumper is in the KG position. Refer to Table 4-D.
4.4.8.2 KG_OUT Jumper
This jumper can invert the sense of the CTS (A) when the CTS (A) jumper is in
the KG position. Refer to Table 4-D.
Table 4-D.
Settings For the
CTS (A) Jumper
KG NORM +6V_GND +6V GND
KG NORM +6V_-6V +6V -6V
KG NORM -6V_GND GND -6V
KG INV +6V_GND GND +6V
KG INV +6V_-6V -6V +6V
KG INV -6V_GND -6V GND
CTS (A) KG_OUT KG_SWING CTS (A) lead CTS (A) lead
when DTR is when DTR is
asserted at negated at
far end 2240 far end 2240