TM  1-1520-240-10            3-2-17 CONTROLS/ INDICATOR FUNCTION T/R Allows the ARC-220 to trans- mit and receive in the selected mode of operation. ZERO Erases all data (including data- fill and keyfill) which has been loaded into the system. Value (12) Two pushbutton switches in- crements a field value or single character value, depending on cursor position. 3-2-23.  Display Lines, HF Radio Set (AN/ARC-220). The  information  displayed  on  each  line  is  dependent upon the operation being performed. This section speci- fies what information can be displayed on each particular line. CONTROLS/ INDICATOR FUNCTION Line 1 Alpha-numeric display of 15 characters maximum contain- ing channel title (call sign). Default value - Mode: chan- nel# Line 2 ALE Address Alpha-numeric display of 15 characters maximum contain- ing the Call To (ADRS: xxx) or Self (SELF: xxx) Addresss. (ADRS:) and (SELF:) labels are removed for addresses greater than 10 characters in length. Noise Reduction Character display (ON, OFF) having a display format of - NOISE REDUCE: xxx. De- fault value is ON. Fill Type Character display (KEY, DATA) having a display For- mat - TYPE: xxxx x. Default is DATA. Contention Control Character display (ON, OFF) having a display format of - LBC: xxx. Default is OFF. CONTROLS/ INDICATOR FUNCTION Line 3 Receive Frequency Numeric display (2.0 to 29.9999 MHz) with a display format of RCV xx.xxxx. ECCM Station Type Character display (MEMBER, ALTERNATE, MASTER, NET ENTRY, ALT NET ENT). De- fault is MEMBER. Lines 3, 4 Character display of emission mode (USB, LSB, AME, CW) one space to right of frequen- cy. Default is USB. Line 4 Transmit Frequency Numeric display (2.0 to 29.999 MHz) with format of XMT xx.xxxx. Time Numeric display (00:00:00 to 23:59:59) with a format of - Hour:Minute:Second. Line 5 Link Protection Character display (OFF, ON) with a format of - LINK PROT: xxx. Default is ON (OFF if no link protection da- tafill. Date Alphanumeric display (01 JAN 00 to 31 DEC 99) with format of - dd MM yy. Antenna Type Character display (T/R, RCV) with format of - ANT: x xx. Default is T/r. Line 6 Power Level Character display (LOW, MED, HIGH) with format of - PWR: xxxx. Default is HIGH. Squelch Alpha-numeric display (TONE, 0 to 5) with format of - SQ: xxx. Volume Numeric display (1 to 8) with format of - VOL: x. Listen Before Talk Character display (ON, OFF) with format of - LBT: xxx. De- fault value is OFF.