MNZM/ lA
MNZM/2
MN2M/3
MN2M/3A
MN2M/4
MNZM/4A-G
MN2M/5
MN2M/5A
MN2M/6
MNZM/6A-G
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MN2
PS2/9. Receiving end: 2 PN3/23 with FL4/19, AMlM/16A,
AMlM/16C, PS2/9, AM7/2, FL2/6, DM1/1A, DM1/1B, UN20/2,
1N2/501, PS2/2lA. Superseded by MN2M/3, MN2M/4. DD 1965.
DDHB 5.44. CANCELLED.
As MN2M/1 but with addition of quadrature unit UN1/61 at
sending and receiving ends to reduce incidence of unwanted
alarms from phase distortion which has negligible
subjective effects of programme, and an additional
AMlM/16A, AMlM/16C, at the receiving end, and additional
AMlM/16B at the sending end. Superseded by MN2M/5,
MN2M/6. DD 1966. DDHB 5.44. CANCELLED.
Sound Automatic Monitor Minor. Simplified version of
MN2M/1. Automatically compares a sound programme signal
with a reference programme signal available at the same
point. PN3/23 with PS2/67 or PS2/81, 1N2/501 or UN1/99,
UN20/2, AMlM/16A, AMlM/16B, AM1M/16C, UN1/67. DD 1965.
DD Spec 5.113. ACO. OBSOLESCENT.
Sound Automatic Monitor Major, Sending. PN3/23 with
FL4/23-26 as required. AMlM/16B, GE1/3, PS2/49. DD 1966.
DD Spec 5.112. ACO. OBSOLESCENT.
Modified version of MN2M/3 permitting use of SB lines
equipped with 3 winding repeating coils where required.
PN3/23 with FL4/48A-G as required, AMlM/16B, GE1/3,
PS2/49.
DD 1970.
DDM111.129(71).
DDTM 11.63.
OBSOLESCENT.
Sound Automatic Monitor Major, Receiving. Two PN3/23 with
FL4/23-26 as required, AMlM/16A, AMlM/16B, UN20/2, UN1/99,
PS2/21A
or
PS2/81.
DD 1966.
DD Spec 5.112.
ACO.
OBSOLESCENT.
Modified versions
instead of AM7/4.
OVSOLESCENT.
of MN2M/4 using AM1/35A-G respectively
DD 1970. DDM111.129(71). DDTM 11.63.
Sound Automatic Monitor Major, Quadrature Sending. PN3/23
with FL4/23-26 as required, UN1/61, 2 AMlM/16B, GE1/3,
PS2/49. DD 1966. DD Spec 5.112. ACO. OBSOLESCENT.
Modified version of MN2M/5 permitting use of SB lines
equipped with 3 winding repeating coils where required.
PN3/23 with FL4/48A-G as required, UN1/61, 2 AMlM/16B,
GE1/3, PS2/49. DD 1970. DDM111.129(71). DDTM 11.63.
OBSOLESCENT.
Sound Automatic Monitor Major, Quadrature Receiving. Two
PN3/23 with FL4/23-26 as required, UN1/61, 2 AMlM/16A, 2
AM1M/16C, PS2/50, AM7/4, FL3/8-11 as required, DM1/1A,
DM1/1B, UN20/2, 1N2/501 or UN1/99, PS2/21A or PS2/81.
DD 1966. DD Spec 5.112. ACO. OBSOLESCENT.
Modified versions of MN2M/6 using AM1/35A-G respectively
instead of AM7/4. DD 1970. DDM111.129(71). DDTM 11.63.
OBSOLESCENT.

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