diff --git a/iq/shift_IQ.c b/iq/shift_IQ.c
index 2a5a03f..0b702ac 100644
--- a/iq/shift_IQ.c
+++ b/iq/shift_IQ.c
@@ -5,7 +5,7 @@
  */
 
 /*
-    sdrsharpIQ.wav = conj(rtlsdrIQ.wav)  ->  rtlsdrIQ.wav: swapIQ
+    sdr#<rev1381: sdrsharpIQ.wav = conj(rtlsdrIQ.wav)  ->  rtlsdrIQ.wav: swapIQ
 */
 /*
     time domain                       frequency domain
diff --git a/rs41/rs41stdin.c b/rs41/rs41stdin.c
index a61ceb8..5e03c86 100644
--- a/rs41/rs41stdin.c
+++ b/rs41/rs41stdin.c
@@ -205,7 +205,7 @@ int read_bits_fsk(FILE *fp, int *bit, int *len) {
     *len = (int)(l+0.5);
 
     if (!option_inv) *bit = (1+par_alt)/2;  // oben 1, unten -1
-    else             *bit = (1-par_alt)/2;  // sdr#<rev14?, invers: unten 1, oben -1
+    else             *bit = (1-par_alt)/2;  // sdr#<rev1381?, invers: unten 1, oben -1
 
     /* Y-offset ? */
 
diff --git a/rs92/rs92gps.c b/rs92/rs92gps.c
index c5e5afd..8662a8b 100644
--- a/rs92/rs92gps.c
+++ b/rs92/rs92gps.c
@@ -237,7 +237,7 @@ int read_bits_fsk(FILE *fp, int *bit, int *len) {
     *len = (int)(l+0.5);
 
     if (!option_inv) *bit = (1+par_alt)/2;  // oben 1, unten -1
-    else             *bit = (1-par_alt)/2;  // sdr#<rev14?, invers: unten 1, oben -1
+    else             *bit = (1-par_alt)/2;  // sdr#<rev1381?, invers: unten 1, oben -1
 
     /* Y-offset ? */
 
diff --git a/rs92/rs92gps_rawin.c b/rs92/rs92gps_rawin.c
index 49c00ab..b2c46c1 100644
--- a/rs92/rs92gps_rawin.c
+++ b/rs92/rs92gps_rawin.c
@@ -232,7 +232,7 @@ int read_bits_fsk(FILE *fp, int *bit, int *len) {
     *len = (int)(l+0.5);
 
     if (!option_inv) *bit = (1+par_alt)/2;  // oben 1, unten -1
-    else             *bit = (1-par_alt)/2;  // sdr#<rev14?, invers: unten 1, oben -1
+    else             *bit = (1-par_alt)/2;  // sdr#<rev1381?, invers: unten 1, oben -1
 
     /* Y-offset ? */