Gestetner A193 Service Manual page 666

NCU PARAMETERS
Notes
1. If a setting is not required, store FF in the address.
2. Italy and Belgium only
RAM address 48045E: the lower four bits have the following meaning.
Bit 2 1: International dial tone cadence detection enabled (Belgium)
Bit 1 Not used
Bit 0 1: PSTN dial tone cadence detection enabled (Italy)
If bit 0 or bit 2 is set to 1, the functions of the following RAM addresses
are changed.
480408 (if bit 0 = 1) or 480438 (if bit 2 = 1): tolerance for on or off state
duration (%), and number of cycles required for detection, coded as in
address 480433.
48040B (if bit 0 = 1) or 48043B (if bit 2 = 1): on time, hex code (unit = 20
ms)
48040C (if bit 0 = 1) or 48043C(if bit 2 = 1): off time, hex code (unit = 20
ms)
3. Pulse dial parameters (addresses 48044A to 48044F) are the values for
10 pps. If 20 pps is used, the machine automatically compensates.
4. The first ring may not be detected until 1 to 2.5 wavelengths after the time
specified by this parameter.
5. The calculated level must be between 0 and 10.
The attenuation levels calculated from RAM data are:
High frequency tone: - 0.5 x N
Low frequency tone: - 0.5 x (N
Note: N , for example, means the value stored in address 480452(H)
480452
6. 48044A: Europe - Between Ds opening and Di opening, France -
Between Ds closing and Di opening
48044D: Europe - Between Ds closing and Di closing, France - Between
Ds opening and Di closing
SM
dBm
480452/480454
+ N
480452/480454 480453
4-62
) dBm
(A639)